<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2023 Workiva-->
<!--r:f8008f37-95f6-41c3-9cf6-b796f73a8151,g:6895e537-c673-4bd1-a659-2b90b0dfb10f-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.nationalvision.com/role/CondensedConsolidatedStatementsofOperationsandComprehensiveIncome" xlink:type="simple" xlink:href="eye-20230930.xsd#CondensedConsolidatedStatementsofOperationsandComprehensiveIncome"/>
  <link:definitionLink xlink:role="http://www.nationalvision.com/role/CondensedConsolidatedStatementsofOperationsandComprehensiveIncome" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_9e5c0604-5105-4ea9-b613-fbc99acb77f1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerAbstract_dd95cafc-f3f1-42ea-8e6e-ec8e10d9de17" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenueFromContractWithCustomerAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9e5c0604-5105-4ea9-b613-fbc99acb77f1" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerAbstract_dd95cafc-f3f1-42ea-8e6e-ec8e10d9de17" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_321abb67-6b3a-41a3-8bc9-9c479a2db795" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerAbstract_dd95cafc-f3f1-42ea-8e6e-ec8e10d9de17" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_321abb67-6b3a-41a3-8bc9-9c479a2db795" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_f8412cb6-d47f-4223-a390-243b0badbb38" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CostOfGoodsAndServicesSoldAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9e5c0604-5105-4ea9-b613-fbc99acb77f1" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_f8412cb6-d47f-4223-a390-243b0badbb38" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization_cbd3929f-6da9-4cad-a352-40166e6baecd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_f8412cb6-d47f-4223-a390-243b0badbb38" xlink:to="loc_us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization_cbd3929f-6da9-4cad-a352-40166e6baecd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpensesAbstract_f6e95b84-12ab-448c-b9ea-859fc0c4cb45" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9e5c0604-5105-4ea9-b613-fbc99acb77f1" xlink:to="loc_us-gaap_OperatingExpensesAbstract_f6e95b84-12ab-448c-b9ea-859fc0c4cb45" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_a4ecf09e-800a-49c3-a8a4-dc5e23c50958" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_f6e95b84-12ab-448c-b9ea-859fc0c4cb45" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_a4ecf09e-800a-49c3-a8a4-dc5e23c50958" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAndAmortization_63201634-2269-4c39-a2d3-2b28960d8bb7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_f6e95b84-12ab-448c-b9ea-859fc0c4cb45" xlink:to="loc_us-gaap_DepreciationAndAmortization_63201634-2269-4c39-a2d3-2b28960d8bb7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetImpairmentCharges_df4934a1-32b3-49a7-be3b-bddf19c4ee00" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetImpairmentCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_f6e95b84-12ab-448c-b9ea-859fc0c4cb45" xlink:to="loc_us-gaap_AssetImpairmentCharges_df4934a1-32b3-49a7-be3b-bddf19c4ee00" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOperatingIncomeExpenseNet_6d49bfed-6f63-4f4b-8a26-5355af5dcc2c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherOperatingIncomeExpenseNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_f6e95b84-12ab-448c-b9ea-859fc0c4cb45" xlink:to="loc_us-gaap_OtherOperatingIncomeExpenseNet_6d49bfed-6f63-4f4b-8a26-5355af5dcc2c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_3ff5b532-23c5-4bc5-8fdc-d01038c10f90" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_f6e95b84-12ab-448c-b9ea-859fc0c4cb45" xlink:to="loc_us-gaap_OperatingExpenses_3ff5b532-23c5-4bc5-8fdc-d01038c10f90" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_a30f9113-97d2-4b39-9ccc-6c54b2fc604a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9e5c0604-5105-4ea9-b613-fbc99acb77f1" xlink:to="loc_us-gaap_OperatingIncomeLoss_a30f9113-97d2-4b39-9ccc-6c54b2fc604a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_1c8a0238-8ff5-477d-b2c9-40054f724161" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9e5c0604-5105-4ea9-b613-fbc99acb77f1" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_1c8a0238-8ff5-477d-b2c9-40054f724161" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_2acf914c-7c86-49f2-8276-a7fe1e48d643" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9e5c0604-5105-4ea9-b613-fbc99acb77f1" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_2acf914c-7c86-49f2-8276-a7fe1e48d643" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_7966e51d-2a14-4cea-a752-266caf0d926f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9e5c0604-5105-4ea9-b613-fbc99acb77f1" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_7966e51d-2a14-4cea-a752-266caf0d926f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_cb8f94a0-e73b-4b92-9162-9b419c26fe00" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9e5c0604-5105-4ea9-b613-fbc99acb77f1" xlink:to="loc_us-gaap_NetIncomeLoss_cb8f94a0-e73b-4b92-9162-9b419c26fe00" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareAbstract_d0855f73-c40c-408d-a427-7129450fcede" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EarningsPerShareAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9e5c0604-5105-4ea9-b613-fbc99acb77f1" xlink:to="loc_us-gaap_EarningsPerShareAbstract_d0855f73-c40c-408d-a427-7129450fcede" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_feda98ca-58d0-45f2-9c60-31f1fdbaebf5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_d0855f73-c40c-408d-a427-7129450fcede" xlink:to="loc_us-gaap_EarningsPerShareBasic_feda98ca-58d0-45f2-9c60-31f1fdbaebf5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_e348ca8e-f173-44ff-ad83-266899b83d5e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_d0855f73-c40c-408d-a427-7129450fcede" xlink:to="loc_us-gaap_EarningsPerShareDiluted_e348ca8e-f173-44ff-ad83-266899b83d5e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareReconciliationAbstract_9276d9ef-ad50-4363-bb34-934f33a49d29" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EarningsPerShareReconciliationAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9e5c0604-5105-4ea9-b613-fbc99acb77f1" xlink:to="loc_us-gaap_EarningsPerShareReconciliationAbstract_9276d9ef-ad50-4363-bb34-934f33a49d29" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_3c829c53-c84f-4be0-97d4-95aae31264f1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareReconciliationAbstract_9276d9ef-ad50-4363-bb34-934f33a49d29" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_3c829c53-c84f-4be0-97d4-95aae31264f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_e472375b-ab71-4e23-a1bd-3bae302f7b56" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareReconciliationAbstract_9276d9ef-ad50-4363-bb34-934f33a49d29" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_e472375b-ab71-4e23-a1bd-3bae302f7b56" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_82cb0396-be2c-466b-ab1b-666f898024b0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ComprehensiveIncomeNetOfTaxAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9e5c0604-5105-4ea9-b613-fbc99acb77f1" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_82cb0396-be2c-466b-ab1b-666f898024b0" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_bc4ab5b8-f297-4786-aa4c-1ecc648b4964" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax_c21b060e-6bdf-4f25-8a8f-4953b1d2afd5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_82cb0396-be2c-466b-ab1b-666f898024b0" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax_c21b060e-6bdf-4f25-8a8f-4953b1d2afd5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax_946eeb1f-bd72-48b7-ab29-7063a1dff14a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_82cb0396-be2c-466b-ab1b-666f898024b0" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax_946eeb1f-bd72-48b7-ab29-7063a1dff14a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_0c572b05-db78-420a-b958-7dcd99413434" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_82cb0396-be2c-466b-ab1b-666f898024b0" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_0c572b05-db78-420a-b958-7dcd99413434" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_0caa3c90-a26f-4bb1-937c-3b01a7f67ba9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_9e5c0604-5105-4ea9-b613-fbc99acb77f1" xlink:to="loc_us-gaap_StatementTable_0caa3c90-a26f-4bb1-937c-3b01a7f67ba9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_e4db620b-7c13-4f49-a672-5b2b3ad74845" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_0caa3c90-a26f-4bb1-937c-3b01a7f67ba9" xlink:to="loc_srt_ProductOrServiceAxis_e4db620b-7c13-4f49-a672-5b2b3ad74845" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_e4db620b-7c13-4f49-a672-5b2b3ad74845_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_e4db620b-7c13-4f49-a672-5b2b3ad74845" xlink:to="loc_srt_ProductsAndServicesDomain_e4db620b-7c13-4f49-a672-5b2b3ad74845_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_a64451b7-db4f-4bbe-b2d8-828697212df4" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_e4db620b-7c13-4f49-a672-5b2b3ad74845" xlink:to="loc_srt_ProductsAndServicesDomain_a64451b7-db4f-4bbe-b2d8-828697212df4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_ProductSalesMember_54500342-d8cc-4d78-bf3e-499f6f3efbd0" xlink:href="eye-20230930.xsd#eye_ProductSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_a64451b7-db4f-4bbe-b2d8-828697212df4" xlink:to="loc_eye_ProductSalesMember_54500342-d8cc-4d78-bf3e-499f6f3efbd0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_ServicesAndPlansMember_e5d539d7-49b8-439e-a081-1b41f1bc6bb0" xlink:href="eye-20230930.xsd#eye_ServicesAndPlansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_a64451b7-db4f-4bbe-b2d8-828697212df4" xlink:to="loc_eye_ServicesAndPlansMember_e5d539d7-49b8-439e-a081-1b41f1bc6bb0" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.nationalvision.com/role/CondensedConsolidatedStatementsofStockholdersEquity" xlink:type="simple" xlink:href="eye-20230930.xsd#CondensedConsolidatedStatementsofStockholdersEquity"/>
  <link:definitionLink xlink:role="http://www.nationalvision.com/role/CondensedConsolidatedStatementsofStockholdersEquity" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_c8e93bde-2763-4dbc-a205-13d77ee81f90" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_e4cd30a6-ae40-454b-bdd2-803d8d9597c5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8e93bde-2763-4dbc-a205-13d77ee81f90" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_e4cd30a6-ae40-454b-bdd2-803d8d9597c5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_fc7279c6-3942-4fb5-a5b9-958fffdc1dd0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_e4cd30a6-ae40-454b-bdd2-803d8d9597c5" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_fc7279c6-3942-4fb5-a5b9-958fffdc1dd0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_6f40a48b-05bf-434e-8009-21c793a400fb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_e4cd30a6-ae40-454b-bdd2-803d8d9597c5" xlink:to="loc_us-gaap_StockholdersEquity_6f40a48b-05bf-434e-8009-21c793a400fb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_156fd6cd-3be3-47f9-9510-ed84565bee00" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_e4cd30a6-ae40-454b-bdd2-803d8d9597c5" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_156fd6cd-3be3-47f9-9510-ed84565bee00" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_a1a5f119-75ad-4d53-968a-d16e60ff6d5e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_e4cd30a6-ae40-454b-bdd2-803d8d9597c5" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_a1a5f119-75ad-4d53-968a-d16e60ff6d5e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition_1cc0f476-6f07-479c-aa15-92a9337e16f9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_e4cd30a6-ae40-454b-bdd2-803d8d9597c5" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition_1cc0f476-6f07-479c-aa15-92a9337e16f9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockSharesAcquired_2a326a40-0c30-4812-8862-37c67dae8bc3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TreasuryStockSharesAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_e4cd30a6-ae40-454b-bdd2-803d8d9597c5" xlink:to="loc_us-gaap_TreasuryStockSharesAcquired_2a326a40-0c30-4812-8862-37c67dae8bc3" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_669ae289-f6a4-4857-abde-2d7eb82d3766" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_e4cd30a6-ae40-454b-bdd2-803d8d9597c5" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_669ae289-f6a4-4857-abde-2d7eb82d3766" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_SettlementOf2025NotesAdjustmentsToAdditionalPaidInCapitalSettlementOfDebt_ac27dbf5-5760-47e0-8c03-5293dbdfa5d3" xlink:href="eye-20230930.xsd#eye_SettlementOf2025NotesAdjustmentsToAdditionalPaidInCapitalSettlementOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_e4cd30a6-ae40-454b-bdd2-803d8d9597c5" xlink:to="loc_eye_SettlementOf2025NotesAdjustmentsToAdditionalPaidInCapitalSettlementOfDebt_ac27dbf5-5760-47e0-8c03-5293dbdfa5d3" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax_999a6037-d132-4e82-825a-8150fb61e0a3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_e4cd30a6-ae40-454b-bdd2-803d8d9597c5" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax_999a6037-d132-4e82-825a-8150fb61e0a3" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_5cedcbc4-696c-46d1-a67a-83b5f358b7f7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_e4cd30a6-ae40-454b-bdd2-803d8d9597c5" xlink:to="loc_us-gaap_NetIncomeLoss_5cedcbc4-696c-46d1-a67a-83b5f358b7f7" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_c243b713-39e9-450d-94df-5f4f065ac2d8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_fbae7b13-c68f-4031-afaa-c6fa2c159a02" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_3f0b2018-9d18-483a-9bd0-0e1e1077b68a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_c8e93bde-2763-4dbc-a205-13d77ee81f90" xlink:to="loc_us-gaap_StatementTable_3f0b2018-9d18-483a-9bd0-0e1e1077b68a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_7943f899-3d37-44b1-a7db-06357669f47c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_3f0b2018-9d18-483a-9bd0-0e1e1077b68a" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_7943f899-3d37-44b1-a7db-06357669f47c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_7943f899-3d37-44b1-a7db-06357669f47c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_7943f899-3d37-44b1-a7db-06357669f47c" xlink:to="loc_us-gaap_EquityComponentDomain_7943f899-3d37-44b1-a7db-06357669f47c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_ce69067a-476a-41fb-8266-8d9d4f42f2f7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_7943f899-3d37-44b1-a7db-06357669f47c" xlink:to="loc_us-gaap_EquityComponentDomain_ce69067a-476a-41fb-8266-8d9d4f42f2f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_6dbfcd97-b8ae-4348-954e-56258f19edcc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_ce69067a-476a-41fb-8266-8d9d4f42f2f7" xlink:to="loc_us-gaap_CommonStockMember_6dbfcd97-b8ae-4348-954e-56258f19edcc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_fd51e635-4386-457e-a3d1-8dd144495c1a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_ce69067a-476a-41fb-8266-8d9d4f42f2f7" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_fd51e635-4386-457e-a3d1-8dd144495c1a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_7310e5b5-61cd-4f40-bbca-6cb84b928a68" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_ce69067a-476a-41fb-8266-8d9d4f42f2f7" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_7310e5b5-61cd-4f40-bbca-6cb84b928a68" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_0d73f03b-5b09-4226-9bdd-00e74b5cc547" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_ce69067a-476a-41fb-8266-8d9d4f42f2f7" xlink:to="loc_us-gaap_RetainedEarningsMember_0d73f03b-5b09-4226-9bdd-00e74b5cc547" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonMember_ce95414c-f48d-42b5-81d9-afc22a04cc02" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TreasuryStockCommonMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_ce69067a-476a-41fb-8266-8d9d4f42f2f7" xlink:to="loc_us-gaap_TreasuryStockCommonMember_ce95414c-f48d-42b5-81d9-afc22a04cc02" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.nationalvision.com/role/DescriptionofBusinessandBasisofPresentationBasisofPresentationandPrinciplesofConsolidationDetails" xlink:type="simple" xlink:href="eye-20230930.xsd#DescriptionofBusinessandBasisofPresentationBasisofPresentationandPrinciplesofConsolidationDetails"/>
  <link:definitionLink xlink:role="http://www.nationalvision.com/role/DescriptionofBusinessandBasisofPresentationBasisofPresentationandPrinciplesofConsolidationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_5083aa61-82c6-4d66-a2b1-2e79d4f4708b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_VariableInterestEntitiesNumberOfCorporations_30aea95a-ccd0-4c9d-87c1-78f7dd5971fd" xlink:href="eye-20230930.xsd#eye_VariableInterestEntitiesNumberOfCorporations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_5083aa61-82c6-4d66-a2b1-2e79d4f4708b" xlink:to="loc_eye_VariableInterestEntitiesNumberOfCorporations_30aea95a-ccd0-4c9d-87c1-78f7dd5971fd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_6ac78fa6-77a4-43b7-9089-1f3eab4d118a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_5083aa61-82c6-4d66-a2b1-2e79d4f4708b" xlink:to="loc_us-gaap_Assets_6ac78fa6-77a4-43b7-9089-1f3eab4d118a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_a6d47d7c-b7c8-4584-b547-88fc0da117fc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_5083aa61-82c6-4d66-a2b1-2e79d4f4708b" xlink:to="loc_us-gaap_Liabilities_a6d47d7c-b7c8-4584-b547-88fc0da117fc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_09d12797-a89a-4332-9ce2-14375b16e20d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_5083aa61-82c6-4d66-a2b1-2e79d4f4708b" xlink:to="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_09d12797-a89a-4332-9ce2-14375b16e20d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_5e2e3dfd-407f-4aa1-ae9e-1dd61db6c90d" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_09d12797-a89a-4332-9ce2-14375b16e20d" xlink:to="loc_srt_ConsolidatedEntitiesAxis_5e2e3dfd-407f-4aa1-ae9e-1dd61db6c90d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_5e2e3dfd-407f-4aa1-ae9e-1dd61db6c90d_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_5e2e3dfd-407f-4aa1-ae9e-1dd61db6c90d" xlink:to="loc_srt_ConsolidatedEntitiesDomain_5e2e3dfd-407f-4aa1-ae9e-1dd61db6c90d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_c6fcf264-7275-4a73-8c96-282a9a83b66c" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_5e2e3dfd-407f-4aa1-ae9e-1dd61db6c90d" xlink:to="loc_srt_ConsolidatedEntitiesDomain_c6fcf264-7275-4a73-8c96-282a9a83b66c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_4d757d7e-a42d-4c02-b8a1-a9d5bea61b1d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_c6fcf264-7275-4a73-8c96-282a9a83b66c" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_4d757d7e-a42d-4c02-b8a1-a9d5bea61b1d" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.nationalvision.com/role/TerminationofWalmartPartnershipExitRelatedCostsRecognizedDetails" xlink:type="simple" xlink:href="eye-20230930.xsd#TerminationofWalmartPartnershipExitRelatedCostsRecognizedDetails"/>
  <link:definitionLink xlink:role="http://www.nationalvision.com/role/TerminationofWalmartPartnershipExitRelatedCostsRecognizedDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_b77e0d31-490b-4660-8642-936c44f4fc54" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_bfbb7ec7-0426-47ae-ae56-e5a3fe2a506d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_b77e0d31-490b-4660-8642-936c44f4fc54" xlink:to="loc_us-gaap_RestructuringCharges_bfbb7ec7-0426-47ae-ae56-e5a3fe2a506d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_0cffffe9-98f1-40d8-b5b9-0f50b33a4d5f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_b77e0d31-490b-4660-8642-936c44f4fc54" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_0cffffe9-98f1-40d8-b5b9-0f50b33a4d5f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanAxis_20da65e7-c4af-45c8-840c-7eaf71d9728b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringPlanAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_0cffffe9-98f1-40d8-b5b9-0f50b33a4d5f" xlink:to="loc_us-gaap_RestructuringPlanAxis_20da65e7-c4af-45c8-840c-7eaf71d9728b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_20da65e7-c4af-45c8-840c-7eaf71d9728b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringPlanAxis_20da65e7-c4af-45c8-840c-7eaf71d9728b" xlink:to="loc_us-gaap_RestructuringPlanDomain_20da65e7-c4af-45c8-840c-7eaf71d9728b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_eed8c713-3abc-4668-b73b-b0c421df2de8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringPlanAxis_20da65e7-c4af-45c8-840c-7eaf71d9728b" xlink:to="loc_us-gaap_RestructuringPlanDomain_eed8c713-3abc-4668-b73b-b0c421df2de8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_TerminationOfWalmartPartnershipMember_2464a5d7-7115-4dd4-8b31-b713d8f6ab23" xlink:href="eye-20230930.xsd#eye_TerminationOfWalmartPartnershipMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_eed8c713-3abc-4668-b73b-b0c421df2de8" xlink:to="loc_eye_TerminationOfWalmartPartnershipMember_2464a5d7-7115-4dd4-8b31-b713d8f6ab23" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_9082253a-2a14-4eef-9a6e-a47a143403d0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringCostAndReserveAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_0cffffe9-98f1-40d8-b5b9-0f50b33a4d5f" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_9082253a-2a14-4eef-9a6e-a47a143403d0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_9082253a-2a14-4eef-9a6e-a47a143403d0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_9082253a-2a14-4eef-9a6e-a47a143403d0" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_9082253a-2a14-4eef-9a6e-a47a143403d0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_17b17417-51b4-4926-baf5-cbf189aaafbd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_9082253a-2a14-4eef-9a6e-a47a143403d0" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_17b17417-51b4-4926-baf5-cbf189aaafbd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_ImpairmentChargesMember_7b9b1ea5-6c50-4a97-b591-7c792c6b110d" xlink:href="eye-20230930.xsd#eye_ImpairmentChargesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_17b17417-51b4-4926-baf5-cbf189aaafbd" xlink:to="loc_eye_ImpairmentChargesMember_7b9b1ea5-6c50-4a97-b591-7c792c6b110d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_EmployeeCompensationBenefitsMember_09a9e631-1d55-4c08-b962-3ce9b30b558d" xlink:href="eye-20230930.xsd#eye_EmployeeCompensationBenefitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_17b17417-51b4-4926-baf5-cbf189aaafbd" xlink:to="loc_eye_EmployeeCompensationBenefitsMember_09a9e631-1d55-4c08-b962-3ce9b30b558d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_ProfessionalFeesMember_068acd8f-99c0-44ab-a769-934f65793af5" xlink:href="eye-20230930.xsd#eye_ProfessionalFeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_17b17417-51b4-4926-baf5-cbf189aaafbd" xlink:to="loc_eye_ProfessionalFeesMember_068acd8f-99c0-44ab-a769-934f65793af5" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.nationalvision.com/role/TerminationofWalmartPartnershipOtherPayablesandAccruedExpensesDetails" xlink:type="simple" xlink:href="eye-20230930.xsd#TerminationofWalmartPartnershipOtherPayablesandAccruedExpensesDetails"/>
  <link:definitionLink xlink:role="http://www.nationalvision.com/role/TerminationofWalmartPartnershipOtherPayablesandAccruedExpensesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_573ac876-430a-4fbc-9638-dbf7a11695f5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserveRollForward_0abd9a35-515d-4df3-8df9-d8adb0e2f70d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringReserveRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_573ac876-430a-4fbc-9638-dbf7a11695f5" xlink:to="loc_us-gaap_RestructuringReserveRollForward_0abd9a35-515d-4df3-8df9-d8adb0e2f70d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_7a0cb2d3-e31c-4463-bc12-ac3ad8601049" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringReserve"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_0abd9a35-515d-4df3-8df9-d8adb0e2f70d" xlink:to="loc_us-gaap_RestructuringReserve_7a0cb2d3-e31c-4463-bc12-ac3ad8601049" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_c8174bb9-b513-4815-bf60-864f3f43fa59" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_0abd9a35-515d-4df3-8df9-d8adb0e2f70d" xlink:to="loc_us-gaap_RestructuringCharges_c8174bb9-b513-4815-bf60-864f3f43fa59" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_fe236aee-9f53-42be-8b85-760da2e528c2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringReserve"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_d5ddc60f-93c9-4276-bd26-d87621f5b294" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_573ac876-430a-4fbc-9638-dbf7a11695f5" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_d5ddc60f-93c9-4276-bd26-d87621f5b294" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanAxis_1e0bb4e2-e153-44a8-8b0d-159726b79f35" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringPlanAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_d5ddc60f-93c9-4276-bd26-d87621f5b294" xlink:to="loc_us-gaap_RestructuringPlanAxis_1e0bb4e2-e153-44a8-8b0d-159726b79f35" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_1e0bb4e2-e153-44a8-8b0d-159726b79f35_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringPlanAxis_1e0bb4e2-e153-44a8-8b0d-159726b79f35" xlink:to="loc_us-gaap_RestructuringPlanDomain_1e0bb4e2-e153-44a8-8b0d-159726b79f35_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_f9b104e7-1be1-4a91-b7e2-13236de5774d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringPlanAxis_1e0bb4e2-e153-44a8-8b0d-159726b79f35" xlink:to="loc_us-gaap_RestructuringPlanDomain_f9b104e7-1be1-4a91-b7e2-13236de5774d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_TerminationOfWalmartPartnershipMember_0f2256a4-667a-4c24-b66f-16c299043b4b" xlink:href="eye-20230930.xsd#eye_TerminationOfWalmartPartnershipMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_f9b104e7-1be1-4a91-b7e2-13236de5774d" xlink:to="loc_eye_TerminationOfWalmartPartnershipMember_0f2256a4-667a-4c24-b66f-16c299043b4b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_329907c7-0f35-4958-a1ae-f8c99905411c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringCostAndReserveAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_d5ddc60f-93c9-4276-bd26-d87621f5b294" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_329907c7-0f35-4958-a1ae-f8c99905411c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_329907c7-0f35-4958-a1ae-f8c99905411c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_329907c7-0f35-4958-a1ae-f8c99905411c" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_329907c7-0f35-4958-a1ae-f8c99905411c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_7703b54c-27b1-4c17-9665-4c6f7ed5c3ae" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_329907c7-0f35-4958-a1ae-f8c99905411c" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_7703b54c-27b1-4c17-9665-4c6f7ed5c3ae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_EmployeeCompensationBenefitsMember_64359756-06b2-4c15-bc7b-23c083d652a8" xlink:href="eye-20230930.xsd#eye_EmployeeCompensationBenefitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_7703b54c-27b1-4c17-9665-4c6f7ed5c3ae" xlink:to="loc_eye_EmployeeCompensationBenefitsMember_64359756-06b2-4c15-bc7b-23c083d652a8" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.nationalvision.com/role/TerminationofWalmartPartnershipNarrativeDetails" xlink:type="simple" xlink:href="eye-20230930.xsd#TerminationofWalmartPartnershipNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.nationalvision.com/role/TerminationofWalmartPartnershipNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_5dce1ab3-4f5e-48cf-8034-6bbb280f2c37" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_ImpairedAssetsMeasurementInput_29e44985-e8ea-4bf3-9609-f600c26dd4b6" xlink:href="eye-20230930.xsd#eye_ImpairedAssetsMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_5dce1ab3-4f5e-48cf-8034-6bbb280f2c37" xlink:to="loc_eye_ImpairedAssetsMeasurementInput_29e44985-e8ea-4bf3-9609-f600c26dd4b6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_99b057ca-6607-4ba3-9942-4803887e1130" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_5dce1ab3-4f5e-48cf-8034-6bbb280f2c37" xlink:to="loc_us-gaap_RestructuringCharges_99b057ca-6607-4ba3-9942-4803887e1130" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_ImpairedAssetsFairValueDisclosures_20631738-055d-4bcf-adb2-95c357dbad9c" xlink:href="eye-20230930.xsd#eye_ImpairedAssetsFairValueDisclosures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_5dce1ab3-4f5e-48cf-8034-6bbb280f2c37" xlink:to="loc_eye_ImpairedAssetsFairValueDisclosures_20631738-055d-4bcf-adb2-95c357dbad9c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_16a0e219-ff8a-4676-84f1-8023c2b528c4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_5dce1ab3-4f5e-48cf-8034-6bbb280f2c37" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_16a0e219-ff8a-4676-84f1-8023c2b528c4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_RestructuringAndRelatedCostsTerminationBenefitsExpectedToOccurPeriod_f6e85536-1e5d-4e7c-ac56-bc0b2b5e4e13" xlink:href="eye-20230930.xsd#eye_RestructuringAndRelatedCostsTerminationBenefitsExpectedToOccurPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_5dce1ab3-4f5e-48cf-8034-6bbb280f2c37" xlink:to="loc_eye_RestructuringAndRelatedCostsTerminationBenefitsExpectedToOccurPeriod_f6e85536-1e5d-4e7c-ac56-bc0b2b5e4e13" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_5c8820f7-9ad3-4aac-ac17-394079e11139" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_5dce1ab3-4f5e-48cf-8034-6bbb280f2c37" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_5c8820f7-9ad3-4aac-ac17-394079e11139" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanAxis_c7301ef5-f9de-40a1-8dd2-ce5c161b314c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringPlanAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_5c8820f7-9ad3-4aac-ac17-394079e11139" xlink:to="loc_us-gaap_RestructuringPlanAxis_c7301ef5-f9de-40a1-8dd2-ce5c161b314c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_c7301ef5-f9de-40a1-8dd2-ce5c161b314c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringPlanAxis_c7301ef5-f9de-40a1-8dd2-ce5c161b314c" xlink:to="loc_us-gaap_RestructuringPlanDomain_c7301ef5-f9de-40a1-8dd2-ce5c161b314c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_f731dd01-709d-418c-b6a7-1e406d3c2c45" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringPlanAxis_c7301ef5-f9de-40a1-8dd2-ce5c161b314c" xlink:to="loc_us-gaap_RestructuringPlanDomain_f731dd01-709d-418c-b6a7-1e406d3c2c45" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_TerminationOfWalmartPartnershipMember_e6b21746-11c1-43a2-8d6f-5ddb737c4191" xlink:href="eye-20230930.xsd#eye_TerminationOfWalmartPartnershipMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_f731dd01-709d-418c-b6a7-1e406d3c2c45" xlink:to="loc_eye_TerminationOfWalmartPartnershipMember_e6b21746-11c1-43a2-8d6f-5ddb737c4191" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_99a092de-cad3-4d00-8f02-0bac03e5bb0a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringCostAndReserveAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_5c8820f7-9ad3-4aac-ac17-394079e11139" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_99a092de-cad3-4d00-8f02-0bac03e5bb0a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_99a092de-cad3-4d00-8f02-0bac03e5bb0a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_99a092de-cad3-4d00-8f02-0bac03e5bb0a" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_99a092de-cad3-4d00-8f02-0bac03e5bb0a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_875be0d8-b21c-4170-936f-680b3f711ee3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_99a092de-cad3-4d00-8f02-0bac03e5bb0a" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_875be0d8-b21c-4170-936f-680b3f711ee3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_GoodwillImpairmentMember_8d4e8b66-ae5b-44fe-ae6f-e421c6441c6c" xlink:href="eye-20230930.xsd#eye_GoodwillImpairmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_875be0d8-b21c-4170-936f-680b3f711ee3" xlink:to="loc_eye_GoodwillImpairmentMember_8d4e8b66-ae5b-44fe-ae6f-e421c6441c6c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_FiniteLivedIntangibleAssetsImpairmentMember_2a267436-d69b-452a-ba60-d5d132c6b19c" xlink:href="eye-20230930.xsd#eye_FiniteLivedIntangibleAssetsImpairmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_875be0d8-b21c-4170-936f-680b3f711ee3" xlink:to="loc_eye_FiniteLivedIntangibleAssetsImpairmentMember_2a267436-d69b-452a-ba60-d5d132c6b19c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_PropertyAndEquipmentImpairmentMember_abb8edee-a71c-4b5c-9af5-5b15b5817a18" xlink:href="eye-20230930.xsd#eye_PropertyAndEquipmentImpairmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_875be0d8-b21c-4170-936f-680b3f711ee3" xlink:to="loc_eye_PropertyAndEquipmentImpairmentMember_abb8edee-a71c-4b5c-9af5-5b15b5817a18" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_EmployeeCompensationBenefitsMember_9b9b5a01-0132-452e-8bda-175dba6b4947" xlink:href="eye-20230930.xsd#eye_EmployeeCompensationBenefitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_875be0d8-b21c-4170-936f-680b3f711ee3" xlink:to="loc_eye_EmployeeCompensationBenefitsMember_9b9b5a01-0132-452e-8bda-175dba6b4947" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_ProfessionalFeesMember_9d97fa35-0707-414a-9b38-fc94ebd8d867" xlink:href="eye-20230930.xsd#eye_ProfessionalFeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_875be0d8-b21c-4170-936f-680b3f711ee3" xlink:to="loc_eye_ProfessionalFeesMember_9d97fa35-0707-414a-9b38-fc94ebd8d867" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_642e3f55-7790-4490-bbaa-4dd35aef5f63" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_5c8820f7-9ad3-4aac-ac17-394079e11139" xlink:to="loc_srt_RangeAxis_642e3f55-7790-4490-bbaa-4dd35aef5f63" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_642e3f55-7790-4490-bbaa-4dd35aef5f63_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_642e3f55-7790-4490-bbaa-4dd35aef5f63" xlink:to="loc_srt_RangeMember_642e3f55-7790-4490-bbaa-4dd35aef5f63_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_28ccea56-fded-411d-9a4f-b8cfecd30429" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_642e3f55-7790-4490-bbaa-4dd35aef5f63" xlink:to="loc_srt_RangeMember_28ccea56-fded-411d-9a4f-b8cfecd30429" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_6126ee35-1347-46b9-8380-dd4c34ca077d" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_28ccea56-fded-411d-9a4f-b8cfecd30429" xlink:to="loc_srt_MinimumMember_6126ee35-1347-46b9-8380-dd4c34ca077d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_f7b2df05-9401-4d90-b851-b7c60bdce0f1" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_28ccea56-fded-411d-9a4f-b8cfecd30429" xlink:to="loc_srt_MaximumMember_f7b2df05-9401-4d90-b851-b7c60bdce0f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_00539d0e-960d-4675-b75b-c385d535512c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_5c8820f7-9ad3-4aac-ac17-394079e11139" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_00539d0e-960d-4675-b75b-c385d535512c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_00539d0e-960d-4675-b75b-c385d535512c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_00539d0e-960d-4675-b75b-c385d535512c" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_00539d0e-960d-4675-b75b-c385d535512c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_14130bf8-b730-459c-86e0-0238302677ea" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_00539d0e-960d-4675-b75b-c385d535512c" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_14130bf8-b730-459c-86e0-0238302677ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_CostOfServicesAndPlansMember_0ba7a256-7962-495d-af41-59de1a5ea3fb" xlink:href="eye-20230930.xsd#eye_CostOfServicesAndPlansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_14130bf8-b730-459c-86e0-0238302677ea" xlink:to="loc_eye_CostOfServicesAndPlansMember_0ba7a256-7962-495d-af41-59de1a5ea3fb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_5f1280ad-45d5-4f79-8404-8233c62aa262" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_14130bf8-b730-459c-86e0-0238302677ea" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_5f1280ad-45d5-4f79-8404-8233c62aa262" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueAxis_f3cbbb53-d0bf-4445-9353-4f17d759a164" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationTechniqueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_5c8820f7-9ad3-4aac-ac17-394079e11139" xlink:to="loc_us-gaap_ValuationTechniqueAxis_f3cbbb53-d0bf-4445-9353-4f17d759a164" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_f3cbbb53-d0bf-4445-9353-4f17d759a164_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationTechniqueAxis_f3cbbb53-d0bf-4445-9353-4f17d759a164" xlink:to="loc_us-gaap_ValuationTechniqueDomain_f3cbbb53-d0bf-4445-9353-4f17d759a164_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_b62100c4-b87e-4afc-9c84-a89168b0cdac" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationTechniqueAxis_f3cbbb53-d0bf-4445-9353-4f17d759a164" xlink:to="loc_us-gaap_ValuationTechniqueDomain_b62100c4-b87e-4afc-9c84-a89168b0cdac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDiscountedCashFlowMember_b8612fd2-9635-43ba-8335-a75f13b5b190" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationTechniqueDiscountedCashFlowMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_b62100c4-b87e-4afc-9c84-a89168b0cdac" xlink:to="loc_us-gaap_ValuationTechniqueDiscountedCashFlowMember_b8612fd2-9635-43ba-8335-a75f13b5b190" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_17cdac4d-e77a-4573-8c8b-f20c8dcd0c27" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_5c8820f7-9ad3-4aac-ac17-394079e11139" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_17cdac4d-e77a-4573-8c8b-f20c8dcd0c27" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_17cdac4d-e77a-4573-8c8b-f20c8dcd0c27_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_17cdac4d-e77a-4573-8c8b-f20c8dcd0c27" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_17cdac4d-e77a-4573-8c8b-f20c8dcd0c27_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_2941b46e-e1b1-4f46-b87c-0b5ff6ea1872" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_17cdac4d-e77a-4573-8c8b-f20c8dcd0c27" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_2941b46e-e1b1-4f46-b87c-0b5ff6ea1872" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputDiscountRateMember_4f3fff75-1027-4fa9-88a1-b4a83f307ff5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MeasurementInputDiscountRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_2941b46e-e1b1-4f46-b87c-0b5ff6ea1872" xlink:to="loc_us-gaap_MeasurementInputDiscountRateMember_4f3fff75-1027-4fa9-88a1-b4a83f307ff5" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.nationalvision.com/role/DetailsofCertainBalanceSheetAccountsScheduleofAccountsReceivableNetDetails" xlink:type="simple" xlink:href="eye-20230930.xsd#DetailsofCertainBalanceSheetAccountsScheduleofAccountsReceivableNetDetails"/>
  <link:definitionLink xlink:role="http://www.nationalvision.com/role/DetailsofCertainBalanceSheetAccountsScheduleofAccountsReceivableNetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_4ddb5796-6687-4897-abe3-56285fbc1f82" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableAdditionalDisclosuresAbstract_90cd82e8-8cbf-47d8-b76d-22f1a78f8ce3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsReceivableAdditionalDisclosuresAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_4ddb5796-6687-4897-abe3-56285fbc1f82" xlink:to="loc_us-gaap_AccountsReceivableAdditionalDisclosuresAbstract_90cd82e8-8cbf-47d8-b76d-22f1a78f8ce3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableGrossCurrent_061008a0-b389-4d40-8520-62562b797e55" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsReceivableGrossCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsReceivableAdditionalDisclosuresAbstract_90cd82e8-8cbf-47d8-b76d-22f1a78f8ce3" xlink:to="loc_us-gaap_AccountsReceivableGrossCurrent_061008a0-b389-4d40-8520-62562b797e55" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_78dd7bdf-e62e-4136-8317-8b04de1ada00" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsReceivableAdditionalDisclosuresAbstract_90cd82e8-8cbf-47d8-b76d-22f1a78f8ce3" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_78dd7bdf-e62e-4136-8317-8b04de1ada00" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_6d134618-0f5a-412c-9a11-c85f803e32f0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsReceivableAdditionalDisclosuresAbstract_90cd82e8-8cbf-47d8-b76d-22f1a78f8ce3" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_6d134618-0f5a-412c-9a11-c85f803e32f0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GovernmentAssistanceAmountCumulative_53dea998-1c84-4e6b-b7bc-eba2ab432a06" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GovernmentAssistanceAmountCumulative"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_4ddb5796-6687-4897-abe3-56285fbc1f82" xlink:to="loc_us-gaap_GovernmentAssistanceAmountCumulative_53dea998-1c84-4e6b-b7bc-eba2ab432a06" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_3ba1db4e-a76f-46b6-bb6f-b5fb96f02ee8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_4ddb5796-6687-4897-abe3-56285fbc1f82" xlink:to="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_3ba1db4e-a76f-46b6-bb6f-b5fb96f02ee8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_70dbc3f4-cc4c-494f-9d7c-aa7a854ab2a2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_3ba1db4e-a76f-46b6-bb6f-b5fb96f02ee8" xlink:to="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_70dbc3f4-cc4c-494f-9d7c-aa7a854ab2a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivableTypeDomain_70dbc3f4-cc4c-494f-9d7c-aa7a854ab2a2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ReceivableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_70dbc3f4-cc4c-494f-9d7c-aa7a854ab2a2" xlink:to="loc_us-gaap_ReceivableTypeDomain_70dbc3f4-cc4c-494f-9d7c-aa7a854ab2a2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivableTypeDomain_f54bb50e-dada-4846-ad39-d87764d34aeb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ReceivableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_70dbc3f4-cc4c-494f-9d7c-aa7a854ab2a2" xlink:to="loc_us-gaap_ReceivableTypeDomain_f54bb50e-dada-4846-ad39-d87764d34aeb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeAccountsReceivableMember_de206607-10d0-4e3a-a652-0350bbb2f6c6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TradeAccountsReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReceivableTypeDomain_f54bb50e-dada-4846-ad39-d87764d34aeb" xlink:to="loc_us-gaap_TradeAccountsReceivableMember_de206607-10d0-4e3a-a652-0350bbb2f6c6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditCardReceivablesMember_11b8cadc-404b-4475-bf67-67de8c6b1ec7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditCardReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReceivableTypeDomain_f54bb50e-dada-4846-ad39-d87764d34aeb" xlink:to="loc_us-gaap_CreditCardReceivablesMember_11b8cadc-404b-4475-bf67-67de8c6b1ec7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_OtherReceivablesMember_0eacd90e-4940-4c0a-8828-8e3283816ac9" xlink:href="eye-20230930.xsd#eye_OtherReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReceivableTypeDomain_f54bb50e-dada-4846-ad39-d87764d34aeb" xlink:to="loc_eye_OtherReceivablesMember_0eacd90e-4940-4c0a-8828-8e3283816ac9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GovernmentAssistanceTypeAxis_e8b22989-501b-4744-8b41-7fbd746743ec" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GovernmentAssistanceTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_3ba1db4e-a76f-46b6-bb6f-b5fb96f02ee8" xlink:to="loc_us-gaap_GovernmentAssistanceTypeAxis_e8b22989-501b-4744-8b41-7fbd746743ec" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GovernmentAssistanceTypeDomain_e8b22989-501b-4744-8b41-7fbd746743ec_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GovernmentAssistanceTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GovernmentAssistanceTypeAxis_e8b22989-501b-4744-8b41-7fbd746743ec" xlink:to="loc_us-gaap_GovernmentAssistanceTypeDomain_e8b22989-501b-4744-8b41-7fbd746743ec_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GovernmentAssistanceTypeDomain_3688bc14-5ad0-4754-98d1-2b1422076478" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GovernmentAssistanceTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GovernmentAssistanceTypeAxis_e8b22989-501b-4744-8b41-7fbd746743ec" xlink:to="loc_us-gaap_GovernmentAssistanceTypeDomain_3688bc14-5ad0-4754-98d1-2b1422076478" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_TheCARESActMember_890c6ac5-7441-42d2-ac93-b9e9d5601203" xlink:href="eye-20230930.xsd#eye_TheCARESActMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GovernmentAssistanceTypeDomain_3688bc14-5ad0-4754-98d1-2b1422076478" xlink:to="loc_eye_TheCARESActMember_890c6ac5-7441-42d2-ac93-b9e9d5601203" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.nationalvision.com/role/FairValueMeasurementDetails" xlink:type="simple" xlink:href="eye-20230930.xsd#FairValueMeasurementDetails"/>
  <link:definitionLink xlink:role="http://www.nationalvision.com/role/FairValueMeasurementDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_192de5fc-e903-42d1-aaeb-d1287230ad0a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_AssetsImpairmentChargesUnrelatedToRestructuringTransaction_efb514b9-f8d7-47c4-9fb9-a09d237ac9a6" xlink:href="eye-20230930.xsd#eye_AssetsImpairmentChargesUnrelatedToRestructuringTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_192de5fc-e903-42d1-aaeb-d1287230ad0a" xlink:to="loc_eye_AssetsImpairmentChargesUnrelatedToRestructuringTransaction_efb514b9-f8d7-47c4-9fb9-a09d237ac9a6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_ImpairedAssetsMeasurementInput_6c06fe82-1c52-4931-8602-9be54a70c98e" xlink:href="eye-20230930.xsd#eye_ImpairedAssetsMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_192de5fc-e903-42d1-aaeb-d1287230ad0a" xlink:to="loc_eye_ImpairedAssetsMeasurementInput_6c06fe82-1c52-4931-8602-9be54a70c98e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_ImpairedLongLivedAssetsHeldAndUsedEstimatedFairValueofAsset_95927104-0259-4d7d-aac0-a3dd018d8170" xlink:href="eye-20230930.xsd#eye_ImpairedLongLivedAssetsHeldAndUsedEstimatedFairValueofAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_192de5fc-e903-42d1-aaeb-d1287230ad0a" xlink:to="loc_eye_ImpairedLongLivedAssetsHeldAndUsedEstimatedFairValueofAsset_95927104-0259-4d7d-aac0-a3dd018d8170" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_1957232e-fa33-450c-9d91-e895a801375e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_192de5fc-e903-42d1-aaeb-d1287230ad0a" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_1957232e-fa33-450c-9d91-e895a801375e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_5a9048d0-7bdb-48d6-b7ff-ab4db46fe150" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_192de5fc-e903-42d1-aaeb-d1287230ad0a" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_5a9048d0-7bdb-48d6-b7ff-ab4db46fe150" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_0f49ff69-f66a-494a-8c0b-8d511f58c5b2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_192de5fc-e903-42d1-aaeb-d1287230ad0a" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_0f49ff69-f66a-494a-8c0b-8d511f58c5b2" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_7e46c639-3a2b-4115-8195-a7751b2cd0aa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_192de5fc-e903-42d1-aaeb-d1287230ad0a" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_7e46c639-3a2b-4115-8195-a7751b2cd0aa" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtFairValueDisclosures_a79ecab0-b037-46ff-882a-dc2dc975f703" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConvertibleDebtFairValueDisclosures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_192de5fc-e903-42d1-aaeb-d1287230ad0a" xlink:to="loc_us-gaap_ConvertibleDebtFairValueDisclosures_a79ecab0-b037-46ff-882a-dc2dc975f703" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_33eafbbe-84dd-4893-a6f3-18fca002b893" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByBalanceSheetGroupingTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_192de5fc-e903-42d1-aaeb-d1287230ad0a" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingTable_33eafbbe-84dd-4893-a6f3-18fca002b893" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_ffb98a72-532e-407c-9412-177036080ca5" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_33eafbbe-84dd-4893-a6f3-18fca002b893" xlink:to="loc_srt_RangeAxis_ffb98a72-532e-407c-9412-177036080ca5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_ffb98a72-532e-407c-9412-177036080ca5_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_ffb98a72-532e-407c-9412-177036080ca5" xlink:to="loc_srt_RangeMember_ffb98a72-532e-407c-9412-177036080ca5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_196375cb-027b-4a34-a3d2-423a92b647ca" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_ffb98a72-532e-407c-9412-177036080ca5" xlink:to="loc_srt_RangeMember_196375cb-027b-4a34-a3d2-423a92b647ca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_c83dc3dc-98fa-4f3e-9567-3cb798f2ca72" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_196375cb-027b-4a34-a3d2-423a92b647ca" xlink:to="loc_srt_MinimumMember_c83dc3dc-98fa-4f3e-9567-3cb798f2ca72" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_cd271c40-9a31-495a-9105-71f1981f906d" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_196375cb-027b-4a34-a3d2-423a92b647ca" xlink:to="loc_srt_MaximumMember_cd271c40-9a31-495a-9105-71f1981f906d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_f8ffd651-9c31-4d92-b037-ab6be4b5df5b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_33eafbbe-84dd-4893-a6f3-18fca002b893" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_f8ffd651-9c31-4d92-b037-ab6be4b5df5b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_f8ffd651-9c31-4d92-b037-ab6be4b5df5b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_f8ffd651-9c31-4d92-b037-ab6be4b5df5b" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_f8ffd651-9c31-4d92-b037-ab6be4b5df5b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_88720289-2f96-4b02-9d84-ea995aaae564" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_f8ffd651-9c31-4d92-b037-ab6be4b5df5b" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_88720289-2f96-4b02-9d84-ea995aaae564" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansPayableMember_6526c32a-eca5-4a6b-90da-f887d9a8ae46" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LoansPayableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_88720289-2f96-4b02-9d84-ea995aaae564" xlink:to="loc_us-gaap_LoansPayableMember_6526c32a-eca5-4a6b-90da-f887d9a8ae46" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_5a44d2c0-7fde-4285-a2f0-caa608f6a363" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_88720289-2f96-4b02-9d84-ea995aaae564" xlink:to="loc_us-gaap_ConvertibleDebtMember_5a44d2c0-7fde-4285-a2f0-caa608f6a363" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_424643aa-aead-4b92-b419-9497e4ada7d8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_33eafbbe-84dd-4893-a6f3-18fca002b893" xlink:to="loc_us-gaap_DebtInstrumentAxis_424643aa-aead-4b92-b419-9497e4ada7d8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_424643aa-aead-4b92-b419-9497e4ada7d8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_424643aa-aead-4b92-b419-9497e4ada7d8" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_424643aa-aead-4b92-b419-9497e4ada7d8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_c1a733f9-57ea-4869-9950-a548f80add7c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_424643aa-aead-4b92-b419-9497e4ada7d8" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_c1a733f9-57ea-4869-9950-a548f80add7c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_FirstLienTermALoanAndRevolvingLoansMember_2f8597d6-731a-4aba-b208-67c72f92dec9" xlink:href="eye-20230930.xsd#eye_FirstLienTermALoanAndRevolvingLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_c1a733f9-57ea-4869-9950-a548f80add7c" xlink:to="loc_eye_FirstLienTermALoanAndRevolvingLoansMember_2f8597d6-731a-4aba-b208-67c72f92dec9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_ConvertibleSeniorNotesDueIn2025Member_ee335ea7-afb4-4cdd-9acc-a67914f68dc4" xlink:href="eye-20230930.xsd#eye_ConvertibleSeniorNotesDueIn2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_c1a733f9-57ea-4869-9950-a548f80add7c" xlink:to="loc_eye_ConvertibleSeniorNotesDueIn2025Member_ee335ea7-afb4-4cdd-9acc-a67914f68dc4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_dc89731f-6ba0-42e2-a03b-540bd7c2b03a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_33eafbbe-84dd-4893-a6f3-18fca002b893" xlink:to="loc_us-gaap_CreditFacilityAxis_dc89731f-6ba0-42e2-a03b-540bd7c2b03a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_dc89731f-6ba0-42e2-a03b-540bd7c2b03a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_dc89731f-6ba0-42e2-a03b-540bd7c2b03a" xlink:to="loc_us-gaap_CreditFacilityDomain_dc89731f-6ba0-42e2-a03b-540bd7c2b03a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_765c8480-ca56-4d50-802b-1a9405aa23c8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_dc89731f-6ba0-42e2-a03b-540bd7c2b03a" xlink:to="loc_us-gaap_CreditFacilityDomain_765c8480-ca56-4d50-802b-1a9405aa23c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_1ed68256-30fa-48ce-a030-9370d19182b4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_765c8480-ca56-4d50-802b-1a9405aa23c8" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_1ed68256-30fa-48ce-a030-9370d19182b4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_c8fef122-ec5a-42e4-94d1-cce72592e05b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_33eafbbe-84dd-4893-a6f3-18fca002b893" xlink:to="loc_us-gaap_VariableRateAxis_c8fef122-ec5a-42e4-94d1-cce72592e05b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_c8fef122-ec5a-42e4-94d1-cce72592e05b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_c8fef122-ec5a-42e4-94d1-cce72592e05b" xlink:to="loc_us-gaap_VariableRateDomain_c8fef122-ec5a-42e4-94d1-cce72592e05b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_15b451bb-a12c-4318-b00b-60f7de5bc31d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_c8fef122-ec5a-42e4-94d1-cce72592e05b" xlink:to="loc_us-gaap_VariableRateDomain_15b451bb-a12c-4318-b00b-60f7de5bc31d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember_53296dd2-e27b-4227-b6b2-0cb7c19cffef" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_15b451bb-a12c-4318-b00b-60f7de5bc31d" xlink:to="loc_us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember_53296dd2-e27b-4227-b6b2-0cb7c19cffef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_a58f8c90-65d3-49c0-a70c-fdf49903992d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_33eafbbe-84dd-4893-a6f3-18fca002b893" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_a58f8c90-65d3-49c0-a70c-fdf49903992d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_a58f8c90-65d3-49c0-a70c-fdf49903992d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_a58f8c90-65d3-49c0-a70c-fdf49903992d" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_a58f8c90-65d3-49c0-a70c-fdf49903992d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_15a0711f-b60c-4f36-b38b-0a2138406e96" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_a58f8c90-65d3-49c0-a70c-fdf49903992d" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_15a0711f-b60c-4f36-b38b-0a2138406e96" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_ab185ca6-b286-4d0d-8519-58434c340cdb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_15a0711f-b60c-4f36-b38b-0a2138406e96" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_ab185ca6-b286-4d0d-8519-58434c340cdb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_5cea5239-6715-49d0-926c-73a3d95233e4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_15a0711f-b60c-4f36-b38b-0a2138406e96" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_5cea5239-6715-49d0-926c-73a3d95233e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_0522b309-7b27-4734-8eef-fa82b306391f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_33eafbbe-84dd-4893-a6f3-18fca002b893" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_0522b309-7b27-4734-8eef-fa82b306391f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_0522b309-7b27-4734-8eef-fa82b306391f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_0522b309-7b27-4734-8eef-fa82b306391f" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_0522b309-7b27-4734-8eef-fa82b306391f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_b76f963c-6c87-4396-ad68-4e45f2418945" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_0522b309-7b27-4734-8eef-fa82b306391f" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_b76f963c-6c87-4396-ad68-4e45f2418945" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_c0c46383-ce6c-48d1-8515-464d40d66caf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_b76f963c-6c87-4396-ad68-4e45f2418945" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_c0c46383-ce6c-48d1-8515-464d40d66caf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_2ded8bea-b00c-496a-b99b-ee36e8ef01fd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_b76f963c-6c87-4396-ad68-4e45f2418945" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_2ded8bea-b00c-496a-b99b-ee36e8ef01fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_df57ac3a-2b6f-4a91-9b30-fa3665185e72" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_33eafbbe-84dd-4893-a6f3-18fca002b893" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_df57ac3a-2b6f-4a91-9b30-fa3665185e72" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_df57ac3a-2b6f-4a91-9b30-fa3665185e72_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_df57ac3a-2b6f-4a91-9b30-fa3665185e72" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_df57ac3a-2b6f-4a91-9b30-fa3665185e72_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_8c02d13d-8877-4c9a-b4db-3397c907cc73" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_df57ac3a-2b6f-4a91-9b30-fa3665185e72" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_8c02d13d-8877-4c9a-b4db-3397c907cc73" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputDiscountRateMember_aee8f103-53e3-41c9-818a-0d4d44b0767b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MeasurementInputDiscountRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_8c02d13d-8877-4c9a-b4db-3397c907cc73" xlink:to="loc_us-gaap_MeasurementInputDiscountRateMember_aee8f103-53e3-41c9-818a-0d4d44b0767b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueAxis_1e722006-da3c-4896-8dfd-4d955503ed0d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationTechniqueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_33eafbbe-84dd-4893-a6f3-18fca002b893" xlink:to="loc_us-gaap_ValuationTechniqueAxis_1e722006-da3c-4896-8dfd-4d955503ed0d" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_1e722006-da3c-4896-8dfd-4d955503ed0d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationTechniqueAxis_1e722006-da3c-4896-8dfd-4d955503ed0d" xlink:to="loc_us-gaap_ValuationTechniqueDomain_1e722006-da3c-4896-8dfd-4d955503ed0d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_1f2368e2-0c34-42c1-be4d-be66f151ef70" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationTechniqueAxis_1e722006-da3c-4896-8dfd-4d955503ed0d" xlink:to="loc_us-gaap_ValuationTechniqueDomain_1f2368e2-0c34-42c1-be4d-be66f151ef70" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDiscountedCashFlowMember_d32885f7-d6ce-4b36-bd2e-6d859f3f718b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationTechniqueDiscountedCashFlowMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_1f2368e2-0c34-42c1-be4d-be66f151ef70" xlink:to="loc_us-gaap_ValuationTechniqueDiscountedCashFlowMember_d32885f7-d6ce-4b36-bd2e-6d859f3f718b" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.nationalvision.com/role/LongtermDebtScheduleofLongTermDebtDetails" xlink:type="simple" xlink:href="eye-20230930.xsd#LongtermDebtScheduleofLongTermDebtDetails"/>
  <link:definitionLink xlink:role="http://www.nationalvision.com/role/LongtermDebtScheduleofLongTermDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_8f585f02-938b-415f-a944-afd9567051dc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_92e51f28-bd64-4390-822e-9656989b108f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8f585f02-938b-415f-a944-afd9567051dc" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_92e51f28-bd64-4390-822e-9656989b108f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscount_e2a19471-b5b9-4fb2-955e-1daed1cd6953" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentUnamortizedDiscount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8f585f02-938b-415f-a944-afd9567051dc" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscount_e2a19471-b5b9-4fb2-955e-1daed1cd6953" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_f7a6b453-80cb-4af0-802e-789d712fc04e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8f585f02-938b-415f-a944-afd9567051dc" xlink:to="loc_us-gaap_LongTermDebt_f7a6b453-80cb-4af0-802e-789d712fc04e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_8d747d45-c4f6-40ef-bee2-f0e0f5614666" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8f585f02-938b-415f-a944-afd9567051dc" xlink:to="loc_us-gaap_LongTermDebtCurrent_8d747d45-c4f6-40ef-bee2-f0e0f5614666" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_5d50f73c-8f4b-4985-a75b-d6688031a1a7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8f585f02-938b-415f-a944-afd9567051dc" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_5d50f73c-8f4b-4985-a75b-d6688031a1a7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiability_67108da3-a8a1-4983-bcc3-19e230e64a15" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8f585f02-938b-415f-a944-afd9567051dc" xlink:to="loc_us-gaap_FinanceLeaseLiability_67108da3-a8a1-4983-bcc3-19e230e64a15" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityCurrent_aedeb9ff-6017-4472-9945-7faf778483a7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8f585f02-938b-415f-a944-afd9567051dc" xlink:to="loc_us-gaap_FinanceLeaseLiabilityCurrent_aedeb9ff-6017-4472-9945-7faf778483a7" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_adb10c38-853a-4524-93f8-7c01abea5c59" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8f585f02-938b-415f-a944-afd9567051dc" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_adb10c38-853a-4524-93f8-7c01abea5c59" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_438e02df-e60c-4f58-998d-8ab703331dca" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8f585f02-938b-415f-a944-afd9567051dc" xlink:to="loc_us-gaap_DebtInstrumentTable_438e02df-e60c-4f58-998d-8ab703331dca" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_8db6fd3b-61b4-481e-b756-a67fb99407e3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_438e02df-e60c-4f58-998d-8ab703331dca" xlink:to="loc_us-gaap_DebtInstrumentAxis_8db6fd3b-61b4-481e-b756-a67fb99407e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_8db6fd3b-61b4-481e-b756-a67fb99407e3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_8db6fd3b-61b4-481e-b756-a67fb99407e3" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_8db6fd3b-61b4-481e-b756-a67fb99407e3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_c78cc928-bf6f-4855-9034-db398a20c7b3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_8db6fd3b-61b4-481e-b756-a67fb99407e3" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_c78cc928-bf6f-4855-9034-db398a20c7b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_ConvertibleSeniorNotesDueIn2025Member_c2d88335-7d66-483e-a785-a12ddcf9248d" xlink:href="eye-20230930.xsd#eye_ConvertibleSeniorNotesDueIn2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_c78cc928-bf6f-4855-9034-db398a20c7b3" xlink:to="loc_eye_ConvertibleSeniorNotesDueIn2025Member_c2d88335-7d66-483e-a785-a12ddcf9248d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_FirstLienTermALoanDueJune132028Member_c742791d-d5b9-462d-94c1-546029719e30" xlink:href="eye-20230930.xsd#eye_FirstLienTermALoanDueJune132028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_c78cc928-bf6f-4855-9034-db398a20c7b3" xlink:to="loc_eye_FirstLienTermALoanDueJune132028Member_c742791d-d5b9-462d-94c1-546029719e30" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_3da94684-b2e4-4968-8f6a-4fd2813f1b67" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_438e02df-e60c-4f58-998d-8ab703331dca" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_3da94684-b2e4-4968-8f6a-4fd2813f1b67" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_3da94684-b2e4-4968-8f6a-4fd2813f1b67_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_3da94684-b2e4-4968-8f6a-4fd2813f1b67" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_3da94684-b2e4-4968-8f6a-4fd2813f1b67_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_d104882d-c43d-4878-943d-5856a345ee1f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_3da94684-b2e4-4968-8f6a-4fd2813f1b67" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_d104882d-c43d-4878-943d-5856a345ee1f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_961a6740-d79c-4f8b-a9eb-477fd998a530" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_d104882d-c43d-4878-943d-5856a345ee1f" xlink:to="loc_us-gaap_ConvertibleDebtMember_961a6740-d79c-4f8b-a9eb-477fd998a530" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansPayableMember_c9513961-1d0a-4771-a51e-8bcf8f38a4b1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LoansPayableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_d104882d-c43d-4878-943d-5856a345ee1f" xlink:to="loc_us-gaap_LoansPayableMember_c9513961-1d0a-4771-a51e-8bcf8f38a4b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_53af0001-771a-44a2-8d19-fd9c9a63b2f2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_d104882d-c43d-4878-943d-5856a345ee1f" xlink:to="loc_us-gaap_LineOfCreditMember_53af0001-771a-44a2-8d19-fd9c9a63b2f2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_431e2285-2010-4fd1-ab04-11e74a17bcc9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_438e02df-e60c-4f58-998d-8ab703331dca" xlink:to="loc_us-gaap_CreditFacilityAxis_431e2285-2010-4fd1-ab04-11e74a17bcc9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_431e2285-2010-4fd1-ab04-11e74a17bcc9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_431e2285-2010-4fd1-ab04-11e74a17bcc9" xlink:to="loc_us-gaap_CreditFacilityDomain_431e2285-2010-4fd1-ab04-11e74a17bcc9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_4a5546a0-3972-4a72-8bd6-b8bb353f45ea" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_431e2285-2010-4fd1-ab04-11e74a17bcc9" xlink:to="loc_us-gaap_CreditFacilityDomain_4a5546a0-3972-4a72-8bd6-b8bb353f45ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_7e1a54f2-a661-4f50-9e41-1bdf643e45a2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_4a5546a0-3972-4a72-8bd6-b8bb353f45ea" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_7e1a54f2-a661-4f50-9e41-1bdf643e45a2" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.nationalvision.com/role/LongtermDebtNarrativeDetails" xlink:type="simple" xlink:href="eye-20230930.xsd#LongtermDebtNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.nationalvision.com/role/LongtermDebtNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_153cc431-61a5-4511-9a53-6b65d048726f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_63d8ad98-5670-4340-a6ee-5dd961e49ec7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_153cc431-61a5-4511-9a53-6b65d048726f" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_63d8ad98-5670-4340-a6ee-5dd961e49ec7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm_22dc50a4-0259-4a9c-aa7d-e8ee4ed87447" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_153cc431-61a5-4511-9a53-6b65d048726f" xlink:to="loc_us-gaap_DebtInstrumentTerm_22dc50a4-0259-4a9c-aa7d-e8ee4ed87447" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleLiquidationPreferenceValue_f8b6ba1f-52c6-4d6e-9dae-bc3f259c35b5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentConvertibleLiquidationPreferenceValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_153cc431-61a5-4511-9a53-6b65d048726f" xlink:to="loc_us-gaap_DebtInstrumentConvertibleLiquidationPreferenceValue_f8b6ba1f-52c6-4d6e-9dae-bc3f259c35b5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_DebtInstrumentPeriodicPaymentsRate_26fe3979-e3c4-4c19-ae23-8c5c141ca795" xlink:href="eye-20230930.xsd#eye_DebtInstrumentPeriodicPaymentsRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_153cc431-61a5-4511-9a53-6b65d048726f" xlink:to="loc_eye_DebtInstrumentPeriodicPaymentsRate_26fe3979-e3c4-4c19-ae23-8c5c141ca795" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_159715e2-4b65-40e7-8854-427241c453bb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_153cc431-61a5-4511-9a53-6b65d048726f" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_159715e2-4b65-40e7-8854-427241c453bb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_DebtInstrumentCovenantEBITDARatioMinimum_509c7a8e-025f-4152-8a2c-97c7d16eba62" xlink:href="eye-20230930.xsd#eye_DebtInstrumentCovenantEBITDARatioMinimum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_153cc431-61a5-4511-9a53-6b65d048726f" xlink:to="loc_eye_DebtInstrumentCovenantEBITDARatioMinimum_509c7a8e-025f-4152-8a2c-97c7d16eba62" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_DebtInstrumentCovenantEBITDARatioMaximum_1792b817-5761-4bed-b616-81a3be49b24d" xlink:href="eye-20230930.xsd#eye_DebtInstrumentCovenantEBITDARatioMaximum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_153cc431-61a5-4511-9a53-6b65d048726f" xlink:to="loc_eye_DebtInstrumentCovenantEBITDARatioMaximum_1792b817-5761-4bed-b616-81a3be49b24d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_be6d4145-942d-4882-bb14-576011fe5e9c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_153cc431-61a5-4511-9a53-6b65d048726f" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_be6d4145-942d-4882-bb14-576011fe5e9c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WriteOffOfDeferredDebtIssuanceCost_94b71ec4-44c4-4231-9682-64924fbefa68" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_WriteOffOfDeferredDebtIssuanceCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_153cc431-61a5-4511-9a53-6b65d048726f" xlink:to="loc_us-gaap_WriteOffOfDeferredDebtIssuanceCost_94b71ec4-44c4-4231-9682-64924fbefa68" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtRelatedCommitmentFeesAndDebtIssuanceCosts_12a2f55a-c493-4fc3-aaff-a97b49a2e3d9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtRelatedCommitmentFeesAndDebtIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_153cc431-61a5-4511-9a53-6b65d048726f" xlink:to="loc_us-gaap_DebtRelatedCommitmentFeesAndDebtIssuanceCosts_12a2f55a-c493-4fc3-aaff-a97b49a2e3d9" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_DebtInstrumentRemainingIssuanceCostsAmortizationPeriod_3a335002-f54a-4c68-8ac4-a43daadb531b" xlink:href="eye-20230930.xsd#eye_DebtInstrumentRemainingIssuanceCostsAmortizationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_153cc431-61a5-4511-9a53-6b65d048726f" xlink:to="loc_eye_DebtInstrumentRemainingIssuanceCostsAmortizationPeriod_3a335002-f54a-4c68-8ac4-a43daadb531b" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_ConvertibleDebtPrincipalAmountConverted_3626b38a-da4e-4d9b-9546-330725613f1e" xlink:href="eye-20230930.xsd#eye_ConvertibleDebtPrincipalAmountConverted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_153cc431-61a5-4511-9a53-6b65d048726f" xlink:to="loc_eye_ConvertibleDebtPrincipalAmountConverted_3626b38a-da4e-4d9b-9546-330725613f1e" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_39629973-59c0-4266-9e17-fd13887fbdcc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_153cc431-61a5-4511-9a53-6b65d048726f" xlink:to="loc_us-gaap_DebtInstrumentTable_39629973-59c0-4266-9e17-fd13887fbdcc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_294ec785-c7b3-4cb0-b058-4de193479edd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_39629973-59c0-4266-9e17-fd13887fbdcc" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_294ec785-c7b3-4cb0-b058-4de193479edd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_294ec785-c7b3-4cb0-b058-4de193479edd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_294ec785-c7b3-4cb0-b058-4de193479edd" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_294ec785-c7b3-4cb0-b058-4de193479edd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_06c8d68b-4c45-465e-93f7-eb70ac098820" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_294ec785-c7b3-4cb0-b058-4de193479edd" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_06c8d68b-4c45-465e-93f7-eb70ac098820" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_bc6ded69-409a-4740-b2c4-b8aa5f987a07" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_06c8d68b-4c45-465e-93f7-eb70ac098820" xlink:to="loc_us-gaap_LineOfCreditMember_bc6ded69-409a-4740-b2c4-b8aa5f987a07" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_9e80cc4b-07af-42c7-9294-9d18ba45789a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_06c8d68b-4c45-465e-93f7-eb70ac098820" xlink:to="loc_us-gaap_ConvertibleDebtMember_9e80cc4b-07af-42c7-9294-9d18ba45789a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_51d5c75e-f4fe-4c6b-af20-f607addc160a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_39629973-59c0-4266-9e17-fd13887fbdcc" xlink:to="loc_us-gaap_DebtInstrumentAxis_51d5c75e-f4fe-4c6b-af20-f607addc160a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_51d5c75e-f4fe-4c6b-af20-f607addc160a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_51d5c75e-f4fe-4c6b-af20-f607addc160a" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_51d5c75e-f4fe-4c6b-af20-f607addc160a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_aa5e4832-9062-4333-a311-dc2e06de1f87" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_51d5c75e-f4fe-4c6b-af20-f607addc160a" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_aa5e4832-9062-4333-a311-dc2e06de1f87" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_CreditAgreementMember_8c82292a-4e41-4ced-9ad5-f663d0b14558" xlink:href="eye-20230930.xsd#eye_CreditAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_aa5e4832-9062-4333-a311-dc2e06de1f87" xlink:to="loc_eye_CreditAgreementMember_8c82292a-4e41-4ced-9ad5-f663d0b14558" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_ConvertibleSeniorNotesDueIn2025Member_0714d1b9-5b39-48e4-a3cb-5df7511567d8" xlink:href="eye-20230930.xsd#eye_ConvertibleSeniorNotesDueIn2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_aa5e4832-9062-4333-a311-dc2e06de1f87" xlink:to="loc_eye_ConvertibleSeniorNotesDueIn2025Member_0714d1b9-5b39-48e4-a3cb-5df7511567d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_0a164e99-8fb7-4efc-88bd-9e24dfe34687" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_39629973-59c0-4266-9e17-fd13887fbdcc" xlink:to="loc_us-gaap_CreditFacilityAxis_0a164e99-8fb7-4efc-88bd-9e24dfe34687" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_0a164e99-8fb7-4efc-88bd-9e24dfe34687_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_0a164e99-8fb7-4efc-88bd-9e24dfe34687" xlink:to="loc_us-gaap_CreditFacilityDomain_0a164e99-8fb7-4efc-88bd-9e24dfe34687_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_6d4bc5f3-a574-4116-8502-17196ea95878" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_0a164e99-8fb7-4efc-88bd-9e24dfe34687" xlink:to="loc_us-gaap_CreditFacilityDomain_6d4bc5f3-a574-4116-8502-17196ea95878" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_71ccc669-fc63-4f2b-b5d7-5cc48a0d61ca" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_6d4bc5f3-a574-4116-8502-17196ea95878" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_71ccc669-fc63-4f2b-b5d7-5cc48a0d61ca" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_TermLoanMember_55d1cc1e-69d5-401f-a5f7-d98a112cd56b" xlink:href="eye-20230930.xsd#eye_TermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_6d4bc5f3-a574-4116-8502-17196ea95878" xlink:to="loc_eye_TermLoanMember_55d1cc1e-69d5-401f-a5f7-d98a112cd56b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_b34e74b7-c889-40fb-93d9-60f72306ec36" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_39629973-59c0-4266-9e17-fd13887fbdcc" xlink:to="loc_us-gaap_VariableRateAxis_b34e74b7-c889-40fb-93d9-60f72306ec36" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_b34e74b7-c889-40fb-93d9-60f72306ec36_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_b34e74b7-c889-40fb-93d9-60f72306ec36" xlink:to="loc_us-gaap_VariableRateDomain_b34e74b7-c889-40fb-93d9-60f72306ec36_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_855edf46-89c8-43c2-b8f4-de53cb67e75b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_b34e74b7-c889-40fb-93d9-60f72306ec36" xlink:to="loc_us-gaap_VariableRateDomain_855edf46-89c8-43c2-b8f4-de53cb67e75b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_SecuredOvernightFinancingRateSOFRMember_2e62bd94-f1ec-4dc3-934e-eeacf8359b76" xlink:href="eye-20230930.xsd#eye_SecuredOvernightFinancingRateSOFRMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_855edf46-89c8-43c2-b8f4-de53cb67e75b" xlink:to="loc_eye_SecuredOvernightFinancingRateSOFRMember_2e62bd94-f1ec-4dc3-934e-eeacf8359b76" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BaseRateMember_8d8c7ef0-8f08-4e49-a5d4-f065f140bbee" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BaseRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_855edf46-89c8-43c2-b8f4-de53cb67e75b" xlink:to="loc_us-gaap_BaseRateMember_8d8c7ef0-8f08-4e49-a5d4-f065f140bbee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_0e178774-0664-4a47-9261-7e31d47eabc6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_39629973-59c0-4266-9e17-fd13887fbdcc" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_0e178774-0664-4a47-9261-7e31d47eabc6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_0e178774-0664-4a47-9261-7e31d47eabc6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_0e178774-0664-4a47-9261-7e31d47eabc6" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_0e178774-0664-4a47-9261-7e31d47eabc6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_90844733-4557-4b10-b1d9-b2c1ee92dd82" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_0e178774-0664-4a47-9261-7e31d47eabc6" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_90844733-4557-4b10-b1d9-b2c1ee92dd82" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsMember_80de0ddd-8cc0-4559-81e3-5903c5d706d9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_90844733-4557-4b10-b1d9-b2c1ee92dd82" xlink:to="loc_us-gaap_OtherAssetsMember_80de0ddd-8cc0-4559-81e3-5903c5d706d9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncurrentLiabilitiesMember_5c4e0c3c-f672-4d14-ab3b-9a41d9327e16" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherNoncurrentLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_90844733-4557-4b10-b1d9-b2c1ee92dd82" xlink:to="loc_us-gaap_OtherNoncurrentLiabilitiesMember_5c4e0c3c-f672-4d14-ab3b-9a41d9327e16" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_DebtCovenantTermsAxis_150e4858-4010-44c0-b9e8-08df6255e5ca" xlink:href="eye-20230930.xsd#eye_DebtCovenantTermsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_39629973-59c0-4266-9e17-fd13887fbdcc" xlink:to="loc_eye_DebtCovenantTermsAxis_150e4858-4010-44c0-b9e8-08df6255e5ca" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_DebtCovenantTermsDomain_150e4858-4010-44c0-b9e8-08df6255e5ca_default" xlink:href="eye-20230930.xsd#eye_DebtCovenantTermsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_eye_DebtCovenantTermsAxis_150e4858-4010-44c0-b9e8-08df6255e5ca" xlink:to="loc_eye_DebtCovenantTermsDomain_150e4858-4010-44c0-b9e8-08df6255e5ca_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_DebtCovenantTermsDomain_b3538b71-d6a1-4c91-a394-caf30990f7a0" xlink:href="eye-20230930.xsd#eye_DebtCovenantTermsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_eye_DebtCovenantTermsAxis_150e4858-4010-44c0-b9e8-08df6255e5ca" xlink:to="loc_eye_DebtCovenantTermsDomain_b3538b71-d6a1-4c91-a394-caf30990f7a0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_DebtCovenantTermOneMember_fb2e11a3-dec8-4021-896f-ef4fde0fa0ae" xlink:href="eye-20230930.xsd#eye_DebtCovenantTermOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_eye_DebtCovenantTermsDomain_b3538b71-d6a1-4c91-a394-caf30990f7a0" xlink:to="loc_eye_DebtCovenantTermOneMember_fb2e11a3-dec8-4021-896f-ef4fde0fa0ae" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_DebtCovenantTermTwoMember_0d2b3cec-a106-4c42-abb3-c7313bc73b0e" xlink:href="eye-20230930.xsd#eye_DebtCovenantTermTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_eye_DebtCovenantTermsDomain_b3538b71-d6a1-4c91-a394-caf30990f7a0" xlink:to="loc_eye_DebtCovenantTermTwoMember_0d2b3cec-a106-4c42-abb3-c7313bc73b0e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_DebtCovenantTermThreeMember_dd8f38a4-04ec-489a-bd0d-94bb2e184edc" xlink:href="eye-20230930.xsd#eye_DebtCovenantTermThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_eye_DebtCovenantTermsDomain_b3538b71-d6a1-4c91-a394-caf30990f7a0" xlink:to="loc_eye_DebtCovenantTermThreeMember_dd8f38a4-04ec-489a-bd0d-94bb2e184edc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_DebtCovenantTermFourMember_349d46d1-d55b-4c8d-a2fe-753262ef7bfd" xlink:href="eye-20230930.xsd#eye_DebtCovenantTermFourMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_eye_DebtCovenantTermsDomain_b3538b71-d6a1-4c91-a394-caf30990f7a0" xlink:to="loc_eye_DebtCovenantTermFourMember_349d46d1-d55b-4c8d-a2fe-753262ef7bfd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_402af5fb-0e49-49b2-863e-50a7bdc1509a" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_39629973-59c0-4266-9e17-fd13887fbdcc" xlink:to="loc_srt_RangeAxis_402af5fb-0e49-49b2-863e-50a7bdc1509a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_402af5fb-0e49-49b2-863e-50a7bdc1509a_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_402af5fb-0e49-49b2-863e-50a7bdc1509a" xlink:to="loc_srt_RangeMember_402af5fb-0e49-49b2-863e-50a7bdc1509a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_773d0a6e-9fce-4604-b8f3-ed57e0895a0e" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_402af5fb-0e49-49b2-863e-50a7bdc1509a" xlink:to="loc_srt_RangeMember_773d0a6e-9fce-4604-b8f3-ed57e0895a0e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_a1b2dd1c-6930-455f-b46c-3976895f7454" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_773d0a6e-9fce-4604-b8f3-ed57e0895a0e" xlink:to="loc_srt_MinimumMember_a1b2dd1c-6930-455f-b46c-3976895f7454" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.nationalvision.com/role/LongtermDebtScheduleofInterestExpenseDetails" xlink:type="simple" xlink:href="eye-20230930.xsd#LongtermDebtScheduleofInterestExpenseDetails"/>
  <link:definitionLink xlink:role="http://www.nationalvision.com/role/LongtermDebtScheduleofInterestExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_4a9a0f47-38be-4305-b3e3-973646832ac2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebtExcludingAmortization_d63d8ef8-7d94-4f1e-a9c9-1bd6b61efb6b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestExpenseDebtExcludingAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4a9a0f47-38be-4305-b3e3-973646832ac2" xlink:to="loc_us-gaap_InterestExpenseDebtExcludingAmortization_d63d8ef8-7d94-4f1e-a9c9-1bd6b61efb6b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_41818e22-992c-4c71-a16e-e24bdcd5bfde" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AmortizationOfFinancingCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4a9a0f47-38be-4305-b3e3-973646832ac2" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_41818e22-992c-4c71-a16e-e24bdcd5bfde" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_6f4f0fa2-8fdd-47d4-9c72-4701079acaee" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4a9a0f47-38be-4305-b3e3-973646832ac2" xlink:to="loc_us-gaap_DebtInstrumentTable_6f4f0fa2-8fdd-47d4-9c72-4701079acaee" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_78885b5c-c183-45b2-8e3a-f0dee227375e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6f4f0fa2-8fdd-47d4-9c72-4701079acaee" xlink:to="loc_us-gaap_DebtInstrumentAxis_78885b5c-c183-45b2-8e3a-f0dee227375e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_78885b5c-c183-45b2-8e3a-f0dee227375e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_78885b5c-c183-45b2-8e3a-f0dee227375e" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_78885b5c-c183-45b2-8e3a-f0dee227375e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_812081f1-8ab0-4bfd-846b-966a83c3c86f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_78885b5c-c183-45b2-8e3a-f0dee227375e" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_812081f1-8ab0-4bfd-846b-966a83c3c86f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_ConvertibleSeniorNotesDueIn2025Member_39a4152b-7354-4352-8d60-d5d6f522b9a9" xlink:href="eye-20230930.xsd#eye_ConvertibleSeniorNotesDueIn2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_812081f1-8ab0-4bfd-846b-966a83c3c86f" xlink:to="loc_eye_ConvertibleSeniorNotesDueIn2025Member_39a4152b-7354-4352-8d60-d5d6f522b9a9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_40d95982-2fb6-415f-a539-39da0efb17a2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6f4f0fa2-8fdd-47d4-9c72-4701079acaee" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_40d95982-2fb6-415f-a539-39da0efb17a2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_40d95982-2fb6-415f-a539-39da0efb17a2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_40d95982-2fb6-415f-a539-39da0efb17a2" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_40d95982-2fb6-415f-a539-39da0efb17a2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_217773c1-fbfe-4792-a556-35169c8a6198" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_40d95982-2fb6-415f-a539-39da0efb17a2" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_217773c1-fbfe-4792-a556-35169c8a6198" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_aa94f55d-a301-44b3-99ce-7d56924aab39" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_217773c1-fbfe-4792-a556-35169c8a6198" xlink:to="loc_us-gaap_ConvertibleDebtMember_aa94f55d-a301-44b3-99ce-7d56924aab39" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.nationalvision.com/role/InterestRateDerivativesDetails" xlink:type="simple" xlink:href="eye-20230930.xsd#InterestRateDerivativesDetails"/>
  <link:definitionLink xlink:role="http://www.nationalvision.com/role/InterestRateDerivativesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_ad87b7a8-bb7c-4866-8006-b20d8bbf1063" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetNotionalAmount_2fb052b5-c79b-40a5-9457-fce48061cc1f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeAssetNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_ad87b7a8-bb7c-4866-8006-b20d8bbf1063" xlink:to="loc_us-gaap_DerivativeAssetNotionalAmount_2fb052b5-c79b-40a5-9457-fce48061cc1f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_1a4227b8-0e2a-40c9-91cb-87c4b2c1b8be" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_ad87b7a8-bb7c-4866-8006-b20d8bbf1063" xlink:to="loc_us-gaap_DerivativeAssets_1a4227b8-0e2a-40c9-91cb-87c4b2c1b8be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_c74a430a-1689-4e0f-a848-4bea1c3afeeb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeGainLossOnDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_ad87b7a8-bb7c-4866-8006-b20d8bbf1063" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_c74a430a-1689-4e0f-a848-4bea1c3afeeb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet_dee62870-a9d8-4eeb-9101-1a1fe20005df" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_ad87b7a8-bb7c-4866-8006-b20d8bbf1063" xlink:to="loc_us-gaap_InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet_dee62870-a9d8-4eeb-9101-1a1fe20005df" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration_5cc3f366-add6-4521-a9ff-fedba53f860f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeGainStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_ad87b7a8-bb7c-4866-8006-b20d8bbf1063" xlink:to="loc_us-gaap_DerivativeGainStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration_5cc3f366-add6-4521-a9ff-fedba53f860f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_98ff49d9-8005-4559-9086-5e15f58905fa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_ad87b7a8-bb7c-4866-8006-b20d8bbf1063" xlink:to="loc_us-gaap_DerivativeTable_98ff49d9-8005-4559-9086-5e15f58905fa" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_368634de-9368-4cc4-abfb-57f12cb774be" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_98ff49d9-8005-4559-9086-5e15f58905fa" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_368634de-9368-4cc4-abfb-57f12cb774be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_368634de-9368-4cc4-abfb-57f12cb774be_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_368634de-9368-4cc4-abfb-57f12cb774be" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_368634de-9368-4cc4-abfb-57f12cb774be_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_1fd38430-0358-4b4a-bf3b-57573c0d4838" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_368634de-9368-4cc4-abfb-57f12cb774be" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_1fd38430-0358-4b4a-bf3b-57573c0d4838" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_InterestRateCollarMember_9b3bde61-2d19-4626-9ac0-726b3e7b1ee4" xlink:href="eye-20230930.xsd#eye_InterestRateCollarMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_1fd38430-0358-4b4a-bf3b-57573c0d4838" xlink:to="loc_eye_InterestRateCollarMember_9b3bde61-2d19-4626-9ac0-726b3e7b1ee4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_6c480359-0398-4955-99a2-c43f13acba66" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_98ff49d9-8005-4559-9086-5e15f58905fa" xlink:to="loc_us-gaap_HedgingDesignationAxis_6c480359-0398-4955-99a2-c43f13acba66" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_6c480359-0398-4955-99a2-c43f13acba66_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_6c480359-0398-4955-99a2-c43f13acba66" xlink:to="loc_us-gaap_HedgingDesignationDomain_6c480359-0398-4955-99a2-c43f13acba66_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_5295cdbd-b99e-4053-adfa-a4290102a84b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_6c480359-0398-4955-99a2-c43f13acba66" xlink:to="loc_us-gaap_HedgingDesignationDomain_5295cdbd-b99e-4053-adfa-a4290102a84b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_c7cbbe81-0ded-464a-b264-81300af80c30" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_5295cdbd-b99e-4053-adfa-a4290102a84b" xlink:to="loc_us-gaap_NondesignatedMember_c7cbbe81-0ded-464a-b264-81300af80c30" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_6787b225-fcc6-4f43-9fc8-e013224ad416" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_98ff49d9-8005-4559-9086-5e15f58905fa" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_6787b225-fcc6-4f43-9fc8-e013224ad416" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_6787b225-fcc6-4f43-9fc8-e013224ad416_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_6787b225-fcc6-4f43-9fc8-e013224ad416" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_6787b225-fcc6-4f43-9fc8-e013224ad416_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_72324b55-1abd-4cd2-b8a5-57da77c76c2b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_6787b225-fcc6-4f43-9fc8-e013224ad416" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_72324b55-1abd-4cd2-b8a5-57da77c76c2b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncurrentLiabilitiesMember_b3edc4b2-2161-4eff-8c5d-7e9e92697376" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherNoncurrentLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_72324b55-1abd-4cd2-b8a5-57da77c76c2b" xlink:to="loc_us-gaap_OtherNoncurrentLiabilitiesMember_b3edc4b2-2161-4eff-8c5d-7e9e92697376" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_70ee55ed-7540-42b0-b1ab-887fe45678df" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_72324b55-1abd-4cd2-b8a5-57da77c76c2b" xlink:to="loc_us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_70ee55ed-7540-42b0-b1ab-887fe45678df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsMember_d14eab6f-8128-49ab-9d0f-e66dda9917c8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_72324b55-1abd-4cd2-b8a5-57da77c76c2b" xlink:to="loc_us-gaap_OtherAssetsMember_d14eab6f-8128-49ab-9d0f-e66dda9917c8" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.nationalvision.com/role/StockIncentivePlansDetails" xlink:type="simple" xlink:href="eye-20230930.xsd#StockIncentivePlansDetails"/>
  <link:definitionLink xlink:role="http://www.nationalvision.com/role/StockIncentivePlansDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ed32c4f3-9f1d-4963-b3a6-539ce6d5ad1d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_85fc62c4-6980-47d9-8859-33b2f26e4899" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ed32c4f3-9f1d-4963-b3a6-539ce6d5ad1d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_85fc62c4-6980-47d9-8859-33b2f26e4899" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfEqualVestingInstallments_c46b5275-d649-4c61-b51d-9ca06260f2f8" xlink:href="eye-20230930.xsd#eye_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfEqualVestingInstallments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ed32c4f3-9f1d-4963-b3a6-539ce6d5ad1d" xlink:to="loc_eye_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfEqualVestingInstallments_c46b5275-d649-4c61-b51d-9ca06260f2f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_74cee6ed-4099-445b-8c51-6c7135aa0948" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ed32c4f3-9f1d-4963-b3a6-539ce6d5ad1d" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_74cee6ed-4099-445b-8c51-6c7135aa0948" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_053d4fed-6472-4c39-ad47-8885a4e691ba" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_74cee6ed-4099-445b-8c51-6c7135aa0948" xlink:to="loc_us-gaap_AwardTypeAxis_053d4fed-6472-4c39-ad47-8885a4e691ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_053d4fed-6472-4c39-ad47-8885a4e691ba_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_053d4fed-6472-4c39-ad47-8885a4e691ba" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_053d4fed-6472-4c39-ad47-8885a4e691ba_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_68484889-ae87-4aa3-9e4f-3787a706ab28" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_053d4fed-6472-4c39-ad47-8885a4e691ba" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_68484889-ae87-4aa3-9e4f-3787a706ab28" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_4215d78e-01f6-449f-aca1-7f0ebf80c26b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_68484889-ae87-4aa3-9e4f-3787a706ab28" xlink:to="loc_us-gaap_PerformanceSharesMember_4215d78e-01f6-449f-aca1-7f0ebf80c26b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_58df632a-0210-45a0-a5aa-bb5d0354a008" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_68484889-ae87-4aa3-9e4f-3787a706ab28" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_58df632a-0210-45a0-a5aa-bb5d0354a008" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.nationalvision.com/role/RevenueFromContractsWithCustomersNarrativeDetails" xlink:type="simple" xlink:href="eye-20230930.xsd#RevenueFromContractsWithCustomersNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.nationalvision.com/role/RevenueFromContractsWithCustomersNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_4f806052-6855-4880-8836-818787a8bb34" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_PaymentTermsForHealthCarePlansAndProgramsAccounts_cf21bd54-9d10-4825-89e1-7283157985de" xlink:href="eye-20230930.xsd#eye_PaymentTermsForHealthCarePlansAndProgramsAccounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_4f806052-6855-4880-8836-818787a8bb34" xlink:to="loc_eye_PaymentTermsForHealthCarePlansAndProgramsAccounts_cf21bd54-9d10-4825-89e1-7283157985de" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_PaymentTermsForHealthCarePlansAndProgramsAccountsMajorityOfPaymentsReceivedWithin_fb2dd225-d0b4-4849-a775-84b5ee99e495" xlink:href="eye-20230930.xsd#eye_PaymentTermsForHealthCarePlansAndProgramsAccountsMajorityOfPaymentsReceivedWithin"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_4f806052-6855-4880-8836-818787a8bb34" xlink:to="loc_eye_PaymentTermsForHealthCarePlansAndProgramsAccountsMajorityOfPaymentsReceivedWithin_fb2dd225-d0b4-4849-a775-84b5ee99e495" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice_a0748f8d-8b09-4345-b9e0-37c62ecd3fda" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_4f806052-6855-4880-8836-818787a8bb34" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice_a0748f8d-8b09-4345-b9e0-37c62ecd3fda" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_be9ce7d0-a066-41c6-8717-7b3c86c07bcf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProvisionForDoubtfulAccounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_4f806052-6855-4880-8836-818787a8bb34" xlink:to="loc_us-gaap_ProvisionForDoubtfulAccounts_be9ce7d0-a066-41c6-8717-7b3c86c07bcf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_bb14b7e9-17bc-4476-82d0-640db55f5311" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_4f806052-6855-4880-8836-818787a8bb34" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_bb14b7e9-17bc-4476-82d0-640db55f5311" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_c189ce22-a337-404c-b3f9-9cf5c23188ef" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_4f806052-6855-4880-8836-818787a8bb34" xlink:to="loc_us-gaap_ContractWithCustomerLiability_c189ce22-a337-404c-b3f9-9cf5c23188ef" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_1fb3d103-f7ac-4f21-a307-158c6994916d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_4f806052-6855-4880-8836-818787a8bb34" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_1fb3d103-f7ac-4f21-a307-158c6994916d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_8f5d35e1-ff85-418c-aced-d3cc1640c0e7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_4f806052-6855-4880-8836-818787a8bb34" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_8f5d35e1-ff85-418c-aced-d3cc1640c0e7" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_d15f7347-b25b-4170-a672-30392e152d53" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_4f806052-6855-4880-8836-818787a8bb34" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_d15f7347-b25b-4170-a672-30392e152d53" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_576c20d9-1cdc-4791-8d32-86ed87f01561" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_d15f7347-b25b-4170-a672-30392e152d53" xlink:to="loc_srt_RangeAxis_576c20d9-1cdc-4791-8d32-86ed87f01561" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_576c20d9-1cdc-4791-8d32-86ed87f01561_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_576c20d9-1cdc-4791-8d32-86ed87f01561" xlink:to="loc_srt_RangeMember_576c20d9-1cdc-4791-8d32-86ed87f01561_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_9da3a2ea-9fcf-4ba5-9871-8d6b0cbb953d" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_576c20d9-1cdc-4791-8d32-86ed87f01561" xlink:to="loc_srt_RangeMember_9da3a2ea-9fcf-4ba5-9871-8d6b0cbb953d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_a822bf4b-9a98-42e8-bd44-f95deeedd0f0" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_9da3a2ea-9fcf-4ba5-9871-8d6b0cbb953d" xlink:to="loc_srt_MinimumMember_a822bf4b-9a98-42e8-bd44-f95deeedd0f0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_3bc932f0-97c3-4673-826b-da740138cafc" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_9da3a2ea-9fcf-4ba5-9871-8d6b0cbb953d" xlink:to="loc_srt_MaximumMember_3bc932f0-97c3-4673-826b-da740138cafc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_28d0cd33-f8f5-4530-862d-7a84438e628b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_d15f7347-b25b-4170-a672-30392e152d53" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_28d0cd33-f8f5-4530-862d-7a84438e628b" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.nationalvision.com/role/RevenueFromContractsWithCustomersNarrativeDetails_1" xlink:type="simple" xlink:href="eye-20230930.xsd#RevenueFromContractsWithCustomersNarrativeDetails_1"/>
  <link:definitionLink xlink:role="http://www.nationalvision.com/role/RevenueFromContractsWithCustomersNarrativeDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_4f806052-6855-4880-8836-818787a8bb34" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_PaymentTermsForHealthCarePlansAndProgramsAccounts_cf21bd54-9d10-4825-89e1-7283157985de" xlink:href="eye-20230930.xsd#eye_PaymentTermsForHealthCarePlansAndProgramsAccounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_4f806052-6855-4880-8836-818787a8bb34" xlink:to="loc_eye_PaymentTermsForHealthCarePlansAndProgramsAccounts_cf21bd54-9d10-4825-89e1-7283157985de" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_PaymentTermsForHealthCarePlansAndProgramsAccountsMajorityOfPaymentsReceivedWithin_fb2dd225-d0b4-4849-a775-84b5ee99e495" xlink:href="eye-20230930.xsd#eye_PaymentTermsForHealthCarePlansAndProgramsAccountsMajorityOfPaymentsReceivedWithin"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_4f806052-6855-4880-8836-818787a8bb34" xlink:to="loc_eye_PaymentTermsForHealthCarePlansAndProgramsAccountsMajorityOfPaymentsReceivedWithin_fb2dd225-d0b4-4849-a775-84b5ee99e495" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice_a0748f8d-8b09-4345-b9e0-37c62ecd3fda" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_4f806052-6855-4880-8836-818787a8bb34" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice_a0748f8d-8b09-4345-b9e0-37c62ecd3fda" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_be9ce7d0-a066-41c6-8717-7b3c86c07bcf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProvisionForDoubtfulAccounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_4f806052-6855-4880-8836-818787a8bb34" xlink:to="loc_us-gaap_ProvisionForDoubtfulAccounts_be9ce7d0-a066-41c6-8717-7b3c86c07bcf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_bb14b7e9-17bc-4476-82d0-640db55f5311" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_4f806052-6855-4880-8836-818787a8bb34" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_bb14b7e9-17bc-4476-82d0-640db55f5311" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_c189ce22-a337-404c-b3f9-9cf5c23188ef" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_4f806052-6855-4880-8836-818787a8bb34" xlink:to="loc_us-gaap_ContractWithCustomerLiability_c189ce22-a337-404c-b3f9-9cf5c23188ef" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_1fb3d103-f7ac-4f21-a307-158c6994916d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_4f806052-6855-4880-8836-818787a8bb34" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_1fb3d103-f7ac-4f21-a307-158c6994916d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_8f5d35e1-ff85-418c-aced-d3cc1640c0e7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_4f806052-6855-4880-8836-818787a8bb34" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_8f5d35e1-ff85-418c-aced-d3cc1640c0e7" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_d15f7347-b25b-4170-a672-30392e152d53" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_4f806052-6855-4880-8836-818787a8bb34" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_d15f7347-b25b-4170-a672-30392e152d53" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_576c20d9-1cdc-4791-8d32-86ed87f01561" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_d15f7347-b25b-4170-a672-30392e152d53" xlink:to="loc_srt_RangeAxis_576c20d9-1cdc-4791-8d32-86ed87f01561" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_576c20d9-1cdc-4791-8d32-86ed87f01561_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_576c20d9-1cdc-4791-8d32-86ed87f01561" xlink:to="loc_srt_RangeMember_576c20d9-1cdc-4791-8d32-86ed87f01561_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_9da3a2ea-9fcf-4ba5-9871-8d6b0cbb953d" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_576c20d9-1cdc-4791-8d32-86ed87f01561" xlink:to="loc_srt_RangeMember_9da3a2ea-9fcf-4ba5-9871-8d6b0cbb953d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_a822bf4b-9a98-42e8-bd44-f95deeedd0f0" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_9da3a2ea-9fcf-4ba5-9871-8d6b0cbb953d" xlink:to="loc_srt_MinimumMember_a822bf4b-9a98-42e8-bd44-f95deeedd0f0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_3bc932f0-97c3-4673-826b-da740138cafc" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_9da3a2ea-9fcf-4ba5-9871-8d6b0cbb953d" xlink:to="loc_srt_MaximumMember_3bc932f0-97c3-4673-826b-da740138cafc" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.nationalvision.com/role/RevenueFromContractsWithCustomersScheduleofDisaggregationofRevenuesDetails" xlink:type="simple" xlink:href="eye-20230930.xsd#RevenueFromContractsWithCustomersScheduleofDisaggregationofRevenuesDetails"/>
  <link:definitionLink xlink:role="http://www.nationalvision.com/role/RevenueFromContractsWithCustomersScheduleofDisaggregationofRevenuesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_c30c93f3-5190-4a8e-8b07-ee20e1f13933" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_228d0078-2498-4949-9887-9d7948bb4e5c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_c30c93f3-5190-4a8e-8b07-ee20e1f13933" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_228d0078-2498-4949-9887-9d7948bb4e5c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_7b0f0ce5-548c-409d-b967-28dd4df7397a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_c30c93f3-5190-4a8e-8b07-ee20e1f13933" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_7b0f0ce5-548c-409d-b967-28dd4df7397a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_0c9a98d5-b6ac-42ac-b4b1-3e2dd66ac924" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TimingOfTransferOfGoodOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_7b0f0ce5-548c-409d-b967-28dd4df7397a" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_0c9a98d5-b6ac-42ac-b4b1-3e2dd66ac924" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_0c9a98d5-b6ac-42ac-b4b1-3e2dd66ac924_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TimingOfTransferOfGoodOrServiceDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_0c9a98d5-b6ac-42ac-b4b1-3e2dd66ac924" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_0c9a98d5-b6ac-42ac-b4b1-3e2dd66ac924_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_a080f152-956c-4014-9e69-3f159f69afab" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TimingOfTransferOfGoodOrServiceDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_0c9a98d5-b6ac-42ac-b4b1-3e2dd66ac924" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_a080f152-956c-4014-9e69-3f159f69afab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransferredAtPointInTimeMember_c3d92857-4b00-42e3-a539-78fd3249fb1a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TransferredAtPointInTimeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_a080f152-956c-4014-9e69-3f159f69afab" xlink:to="loc_us-gaap_TransferredAtPointInTimeMember_c3d92857-4b00-42e3-a539-78fd3249fb1a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransferredOverTimeMember_f94d3262-96ec-440a-8f8e-34e67d9a4a77" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TransferredOverTimeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_a080f152-956c-4014-9e69-3f159f69afab" xlink:to="loc_us-gaap_TransferredOverTimeMember_f94d3262-96ec-440a-8f8e-34e67d9a4a77" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.nationalvision.com/role/CommitmentsandContingenciesDetails" xlink:type="simple" xlink:href="eye-20230930.xsd#CommitmentsandContingenciesDetails"/>
  <link:definitionLink xlink:role="http://www.nationalvision.com/role/CommitmentsandContingenciesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesLineItems_06d88d00-08c5-4a5b-887d-60c71d162f0c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LossContingenciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_NumberOfCompanyOfficersFiledAComplaint_ccf7f527-8c69-4e2d-b024-38fe5f9806fc" xlink:href="eye-20230930.xsd#eye_NumberOfCompanyOfficersFiledAComplaint"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_06d88d00-08c5-4a5b-887d-60c71d162f0c" xlink:to="loc_eye_NumberOfCompanyOfficersFiledAComplaint_ccf7f527-8c69-4e2d-b024-38fe5f9806fc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesTable_676e86c4-3865-4eb0-a2a7-4ca56b985c9a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LossContingenciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LossContingenciesLineItems_06d88d00-08c5-4a5b-887d-60c71d162f0c" xlink:to="loc_us-gaap_LossContingenciesTable_676e86c4-3865-4eb0-a2a7-4ca56b985c9a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseAxis_588d0e75-fc46-45b8-bca0-1a5fdf9e6ab2" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_LitigationCaseAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_676e86c4-3865-4eb0-a2a7-4ca56b985c9a" xlink:to="loc_srt_LitigationCaseAxis_588d0e75-fc46-45b8-bca0-1a5fdf9e6ab2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_588d0e75-fc46-45b8-bca0-1a5fdf9e6ab2_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_LitigationCaseAxis_588d0e75-fc46-45b8-bca0-1a5fdf9e6ab2" xlink:to="loc_srt_LitigationCaseTypeDomain_588d0e75-fc46-45b8-bca0-1a5fdf9e6ab2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_2b69d75c-f721-4cd1-b73c-1a2ef09c6c9f" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_LitigationCaseAxis_588d0e75-fc46-45b8-bca0-1a5fdf9e6ab2" xlink:to="loc_srt_LitigationCaseTypeDomain_2b69d75c-f721-4cd1-b73c-1a2ef09c6c9f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_NorthernDistrictOfGeorgiaFederalCourtMember_8d700a01-26f6-4809-9071-18ac33f477b7" xlink:href="eye-20230930.xsd#eye_NorthernDistrictOfGeorgiaFederalCourtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_2b69d75c-f721-4cd1-b73c-1a2ef09c6c9f" xlink:to="loc_eye_NorthernDistrictOfGeorgiaFederalCourtMember_8d700a01-26f6-4809-9071-18ac33f477b7" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.nationalvision.com/role/SegmentReportingScheduleofFinancialDatabySegmentDetails" xlink:type="simple" xlink:href="eye-20230930.xsd#SegmentReportingScheduleofFinancialDatabySegmentDetails"/>
  <link:definitionLink xlink:role="http://www.nationalvision.com/role/SegmentReportingScheduleofFinancialDatabySegmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_9515e723-5fe8-4f5c-bd4b-c37cd1d85b7b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_4a6252ce-5206-4992-9854-9c3221486c59" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_9515e723-5fe8-4f5c-bd4b-c37cd1d85b7b" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_4a6252ce-5206-4992-9854-9c3221486c59" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization_4dc33125-0cfd-4391-b062-5e5b9f788868" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_9515e723-5fe8-4f5c-bd4b-c37cd1d85b7b" xlink:to="loc_us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization_4dc33125-0cfd-4391-b062-5e5b9f788868" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_0f422247-5cf4-4cb2-82a7-40eab56c3686" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_9515e723-5fe8-4f5c-bd4b-c37cd1d85b7b" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_0f422247-5cf4-4cb2-82a7-40eab56c3686" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetImpairmentCharges_ffb9bd1e-0d67-461d-b0cb-a8b5b35b7f8e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetImpairmentCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_9515e723-5fe8-4f5c-bd4b-c37cd1d85b7b" xlink:to="loc_us-gaap_AssetImpairmentCharges_ffb9bd1e-0d67-461d-b0cb-a8b5b35b7f8e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOperatingIncomeExpenseNet_cf1dc052-3684-4d3f-8e01-fa5af5525c28" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherOperatingIncomeExpenseNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_9515e723-5fe8-4f5c-bd4b-c37cd1d85b7b" xlink:to="loc_us-gaap_OtherOperatingIncomeExpenseNet_cf1dc052-3684-4d3f-8e01-fa5af5525c28" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_EarningsBeforeInterestTaxesDepreciationAndAmortization_34a75463-d9c2-4ea5-bcd9-37bc83185aef" xlink:href="eye-20230930.xsd#eye_EarningsBeforeInterestTaxesDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_9515e723-5fe8-4f5c-bd4b-c37cd1d85b7b" xlink:to="loc_eye_EarningsBeforeInterestTaxesDepreciationAndAmortization_34a75463-d9c2-4ea5-bcd9-37bc83185aef" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAndAmortization_43b01f83-497c-4f25-be05-baef6d81e84f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_9515e723-5fe8-4f5c-bd4b-c37cd1d85b7b" xlink:to="loc_us-gaap_DepreciationAndAmortization_43b01f83-497c-4f25-be05-baef6d81e84f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_9a94b8f6-bf04-4ec6-9786-dcfb632823d5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_9515e723-5fe8-4f5c-bd4b-c37cd1d85b7b" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_9a94b8f6-bf04-4ec6-9786-dcfb632823d5" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_a4718f13-2805-4c85-a53f-383207861367" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_9515e723-5fe8-4f5c-bd4b-c37cd1d85b7b" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_a4718f13-2805-4c85-a53f-383207861367" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_30a66fe5-e3f1-4c61-9e56-7f693307fcdc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_9515e723-5fe8-4f5c-bd4b-c37cd1d85b7b" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_30a66fe5-e3f1-4c61-9e56-7f693307fcdc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_00bcbc45-1c6b-4813-a8d2-c4e742db14c7" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_30a66fe5-e3f1-4c61-9e56-7f693307fcdc" xlink:to="loc_srt_ConsolidationItemsAxis_00bcbc45-1c6b-4813-a8d2-c4e742db14c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_00bcbc45-1c6b-4813-a8d2-c4e742db14c7_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_00bcbc45-1c6b-4813-a8d2-c4e742db14c7" xlink:to="loc_srt_ConsolidationItemsDomain_00bcbc45-1c6b-4813-a8d2-c4e742db14c7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_c4eb42aa-a58b-4089-b4c1-3ebae8dffed5" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_00bcbc45-1c6b-4813-a8d2-c4e742db14c7" xlink:to="loc_srt_ConsolidationItemsDomain_c4eb42aa-a58b-4089-b4c1-3ebae8dffed5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_e4b574ed-96bf-430f-8364-8035d86f547d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_c4eb42aa-a58b-4089-b4c1-3ebae8dffed5" xlink:to="loc_us-gaap_OperatingSegmentsMember_e4b574ed-96bf-430f-8364-8035d86f547d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MaterialReconcilingItemsMember_063daca0-4e62-4fc4-a61a-d2b76823a1d1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MaterialReconcilingItemsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_c4eb42aa-a58b-4089-b4c1-3ebae8dffed5" xlink:to="loc_us-gaap_MaterialReconcilingItemsMember_063daca0-4e62-4fc4-a61a-d2b76823a1d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_778a90bb-3202-4c93-83ce-51e32e01fe0f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_30a66fe5-e3f1-4c61-9e56-7f693307fcdc" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_778a90bb-3202-4c93-83ce-51e32e01fe0f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_778a90bb-3202-4c93-83ce-51e32e01fe0f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_778a90bb-3202-4c93-83ce-51e32e01fe0f" xlink:to="loc_us-gaap_SegmentDomain_778a90bb-3202-4c93-83ce-51e32e01fe0f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_be125af1-40bf-4ac5-8538-c00cb21a3953" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_778a90bb-3202-4c93-83ce-51e32e01fe0f" xlink:to="loc_us-gaap_SegmentDomain_be125af1-40bf-4ac5-8538-c00cb21a3953" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_OwnedAndHostStoreBrandsMember_850d6d90-2828-4d3d-bc82-55323499b3d0" xlink:href="eye-20230930.xsd#eye_OwnedAndHostStoreBrandsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_be125af1-40bf-4ac5-8538-c00cb21a3953" xlink:to="loc_eye_OwnedAndHostStoreBrandsMember_850d6d90-2828-4d3d-bc82-55323499b3d0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_LegacyMember_82c69540-2edd-4177-b678-a511f5dc7364" xlink:href="eye-20230930.xsd#eye_LegacyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_be125af1-40bf-4ac5-8538-c00cb21a3953" xlink:to="loc_eye_LegacyMember_82c69540-2edd-4177-b678-a511f5dc7364" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateAndOtherMember_beac6572-0d08-4cfa-85dc-a470bd31bc82" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CorporateAndOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_be125af1-40bf-4ac5-8538-c00cb21a3953" xlink:to="loc_us-gaap_CorporateAndOtherMember_beac6572-0d08-4cfa-85dc-a470bd31bc82" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_36ea33d3-f61b-4a75-8aaf-58f52b12f2bd" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_30a66fe5-e3f1-4c61-9e56-7f693307fcdc" xlink:to="loc_srt_ProductOrServiceAxis_36ea33d3-f61b-4a75-8aaf-58f52b12f2bd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_36ea33d3-f61b-4a75-8aaf-58f52b12f2bd_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_36ea33d3-f61b-4a75-8aaf-58f52b12f2bd" xlink:to="loc_srt_ProductsAndServicesDomain_36ea33d3-f61b-4a75-8aaf-58f52b12f2bd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_61fea35f-ac0a-4476-b885-b32f3793e281" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_36ea33d3-f61b-4a75-8aaf-58f52b12f2bd" xlink:to="loc_srt_ProductsAndServicesDomain_61fea35f-ac0a-4476-b885-b32f3793e281" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_ProductSalesMember_be1f2ea4-8c06-463a-b606-5d4e69e50af1" xlink:href="eye-20230930.xsd#eye_ProductSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_61fea35f-ac0a-4476-b885-b32f3793e281" xlink:to="loc_eye_ProductSalesMember_be1f2ea4-8c06-463a-b606-5d4e69e50af1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_ServicesAndPlansMember_6c37545d-4399-4655-9c8e-9e634c61f717" xlink:href="eye-20230930.xsd#eye_ServicesAndPlansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_61fea35f-ac0a-4476-b885-b32f3793e281" xlink:to="loc_eye_ServicesAndPlansMember_6c37545d-4399-4655-9c8e-9e634c61f717" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.nationalvision.com/role/EarningsPerShareDetails" xlink:type="simple" xlink:href="eye-20230930.xsd#EarningsPerShareDetails"/>
  <link:definitionLink xlink:role="http://www.nationalvision.com/role/EarningsPerShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_5c9f4d45-549a-4bff-80f3-6f502681c504" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_d9b544e7-5956-4428-8c75-31857aac8274" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_5c9f4d45-549a-4bff-80f3-6f502681c504" xlink:to="loc_us-gaap_NetIncomeLoss_d9b544e7-5956-4428-8c75-31857aac8274" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestOnConvertibleDebtNetOfTax_64102c56-502f-4b91-94ba-9f1905a27cb4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestOnConvertibleDebtNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_5c9f4d45-549a-4bff-80f3-6f502681c504" xlink:to="loc_us-gaap_InterestOnConvertibleDebtNetOfTax_64102c56-502f-4b91-94ba-9f1905a27cb4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_8a071375-e76d-4d6f-a4a0-68204f775820" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_5c9f4d45-549a-4bff-80f3-6f502681c504" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_8a071375-e76d-4d6f-a4a0-68204f775820" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_9c9c36ed-c48d-4736-b2b0-7d91c6d2169b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_5c9f4d45-549a-4bff-80f3-6f502681c504" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_9c9c36ed-c48d-4736-b2b0-7d91c6d2169b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_69b4a6ab-c56f-4420-a435-e265781e61e9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_5c9f4d45-549a-4bff-80f3-6f502681c504" xlink:to="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_69b4a6ab-c56f-4420-a435-e265781e61e9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_aa6758c2-cbda-46e0-9a4d-06b50583756e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_69b4a6ab-c56f-4420-a435-e265781e61e9" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_aa6758c2-cbda-46e0-9a4d-06b50583756e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_IncrementalCommonSharesAttributableToDilutiveEffectOfVestingOfRestrictedStock_14cb16e9-182a-423b-8f37-030c865511d2" xlink:href="eye-20230930.xsd#eye_IncrementalCommonSharesAttributableToDilutiveEffectOfVestingOfRestrictedStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_69b4a6ab-c56f-4420-a435-e265781e61e9" xlink:to="loc_eye_IncrementalCommonSharesAttributableToDilutiveEffectOfVestingOfRestrictedStock_14cb16e9-182a-423b-8f37-030c865511d2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities_aa81d711-a962-47b0-afed-7d8f945e905b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_69b4a6ab-c56f-4420-a435-e265781e61e9" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities_aa81d711-a962-47b0-afed-7d8f945e905b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_bef83089-9e17-428f-96ef-db492f148d87" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_5c9f4d45-549a-4bff-80f3-6f502681c504" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_bef83089-9e17-428f-96ef-db492f148d87" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_9c6a2d60-ce88-4d5d-a745-a405a55e9e97" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_5c9f4d45-549a-4bff-80f3-6f502681c504" xlink:to="loc_us-gaap_EarningsPerShareBasic_9c6a2d60-ce88-4d5d-a745-a405a55e9e97" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_bb940afd-6d57-4df2-b166-abe8cc48ea20" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_5c9f4d45-549a-4bff-80f3-6f502681c504" xlink:to="loc_us-gaap_EarningsPerShareDiluted_bb940afd-6d57-4df2-b166-abe8cc48ea20" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_f5c9dcf7-b70b-4174-81bb-72be2d8c9ecb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_5c9f4d45-549a-4bff-80f3-6f502681c504" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_f5c9dcf7-b70b-4174-81bb-72be2d8c9ecb" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_242160f9-6386-4a25-ba00-517d831284ad" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_5c9f4d45-549a-4bff-80f3-6f502681c504" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_242160f9-6386-4a25-ba00-517d831284ad" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_c0cc1755-ed90-42e8-ad23-e9a8f3e468d2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_242160f9-6386-4a25-ba00-517d831284ad" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_c0cc1755-ed90-42e8-ad23-e9a8f3e468d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_c0cc1755-ed90-42e8-ad23-e9a8f3e468d2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_c0cc1755-ed90-42e8-ad23-e9a8f3e468d2" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_c0cc1755-ed90-42e8-ad23-e9a8f3e468d2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_b4b7426b-9ee2-4025-9e40-4a63e5580a79" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_c0cc1755-ed90-42e8-ad23-e9a8f3e468d2" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_b4b7426b-9ee2-4025-9e40-4a63e5580a79" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_StockOptionsRestrictedStockUnitsRSUsAndConvertibleNotesMember_b1553234-1987-48a0-9baf-10c6b2a2bd4b" xlink:href="eye-20230930.xsd#eye_StockOptionsRestrictedStockUnitsRSUsAndConvertibleNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_b4b7426b-9ee2-4025-9e40-4a63e5580a79" xlink:to="loc_eye_StockOptionsRestrictedStockUnitsRSUsAndConvertibleNotesMember_b1553234-1987-48a0-9baf-10c6b2a2bd4b" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://xbrl.sec.gov/ecd/role/TradingArrangementsOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/ecd/2023/ecd-2023.xsd#TradingArrangmentsOnly"/>
  <link:definitionLink xlink:role="http://xbrl.sec.gov/ecd/role/TradingArrangementsOnly" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AllTradingArrangementsMember" xlink:href="https://xbrl.sec.gov/ecd/2023/ecd-2023.xsd#ecd_AllTradingArrangementsMember"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_LReadeFahsJune2023PlanMember_b193a638-a42b-40ad-9b30-dcac19d99645" xlink:href="eye-20230930.xsd#eye_LReadeFahsJune2023PlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ecd_AllTradingArrangementsMember" xlink:to="loc_eye_LReadeFahsJune2023PlanMember_b193a638-a42b-40ad-9b30-dcac19d99645" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_LReadeFahsAugust2023PlanMember_f210c613-1ba5-476a-b9e7-7450f568b4bf" xlink:href="eye-20230930.xsd#eye_LReadeFahsAugust2023PlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ecd_AllTradingArrangementsMember" xlink:to="loc_eye_LReadeFahsAugust2023PlanMember_f210c613-1ba5-476a-b9e7-7450f568b4bf" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://xbrl.sec.gov/ecd/AwardTypeOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/ecd/2023/ecd-2023.xsd#AwardTypeOnly"/>
  <link:definitionLink xlink:role="http://xbrl.sec.gov/ecd/AwardTypeOnly" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="loc_us-gaap_PerformanceSharesMember" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://xbrl.sec.gov/ecd/role/IndividualsOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/ecd/2023/ecd-2023.xsd#IndividualsOnly"/>
  <link:definitionLink xlink:role="http://xbrl.sec.gov/ecd/role/IndividualsOnly" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AllIndividualsMember" xlink:href="https://xbrl.sec.gov/ecd/2023/ecd-2023.xsd#ecd_AllIndividualsMember"/>
    <link:loc xlink:type="locator" xlink:label="loc_eye_LReadeFahsMember_8463404e-7a7a-4f3e-89a6-5937b74514bc" xlink:href="eye-20230930.xsd#eye_LReadeFahsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ecd_AllIndividualsMember" xlink:to="loc_eye_LReadeFahsMember_8463404e-7a7a-4f3e-89a6-5937b74514bc" xlink:type="arc" order="2"/>
  </link:definitionLink>
</link:linkbase>
