Disaggregation of Sales, Geographic Sales and Product Sales - Net Sales by Products and Services (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2022	Jul. 02, 2021	Jul. 01, 2022	Jul. 02, 2021
Product Information [Line Items]
Total other product sales	$ 3,179	$ 3,132	$ 7,704	$ 7,383
Total net sales	81,101	62,367	144,301	113,119
ICLs [Member]
Product Information [Line Items]
Revenue from contract with customer, excluding assessed tax	77,922	59,235	136,597	105,736
Cataract IOLs [Member]
Product Information [Line Items]
Total other product sales	2,547	3,074	5,449	6,799
Other surgical products [Member]
Product Information [Line Items]
Total other product sales	$ 632	$ 58	$ 2,255	$ 584