Disaggregation of Sales, Geographic Sales and Product Sales - Net Sales by Products and Services (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 29, 2023	Sep. 30, 2022	Sep. 29, 2023	Sep. 30, 2022
Product Information [Line Items]
Total other product sales		$ (761)	$ 4,093	$ 1,336	$ 11,797
Total net sales		80,308	76,046	246,142	220,347
ICLs [Member]
Product Information [Line Items]
Revenue from contract with customer, excluding assessed tax		81,069	71,953	244,806	208,550
Cataract IOLs [Member]
Product Information [Line Items]
Total other product sales		221	2,191	1,295	7,640
Other surgical products [Member]
Product Information [Line Items]
Total other product sales	[1]	$ (540)	$ 1,902	$ 41	$ 4,157

[1] Other surgical products include delivery systems and normal recurring sales adjustments such as sales return allowances.