Disaggregation of Sales, Geographic Sales and Product Sales - Net Sales by Products and Services (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023	Apr. 01, 2022
Product Information [Line Items]
Total other product sales		$ 2,903	$ 4,525
Total net sales		73,528	63,200
ICLs [Member]
Product Information [Line Items]
Revenue from contract with customer, excluding assessed tax		70,625	58,675
Cataract IOLs [Member]
Product Information [Line Items]
Total other product sales		1,476	2,902
Other surgical products [Member]
Product Information [Line Items]
Total other product sales	[1]	$ 1,427	$ 1,623

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