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Disaggregation of Sales, Geographic Sales and Product Sales - Additional Information (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 29, 2023 Country	Sep. 30, 2022	Sep. 29, 2023 Country Segment	Sep. 30, 2022	Dec. 30, 2022
Geographic and Product Data [Line Items]
Number of countries in which Company operates | Country	75		75
Number of operating segments | Segment			1
Sales Revenue, Net | Geographic Concentration Risk [Member] | Other than China and Japan [Member] | Maximum
Geographic and Product Data [Line Items]
Concentration risk, percentage			10.00%
Sales Revenue, Net | Geographic Concentration Risk [Member] | China [Member] | Customer One [Member]
Geographic and Product Data [Line Items]
Concentration risk, percentage	60.00%	56.00%	59.00%	53.00%
Sales Revenue, Net | Product Concentration Risk [Member] | Ophthalmic Surgical Product [Member]
Geographic and Product Data [Line Items]
Concentration risk, percentage			100.00%
Accounts Receivable [Member] | Geographic Concentration Risk [Member] | China [Member] | Customer One [Member]
Geographic and Product Data [Line Items]
Concentration risk, percentage			78.00%		59.00%

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The number of countries in which the entity operates as of balance sheet date.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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