Disaggregation of Sales, Geographic Sales and Product Sales - Net Sales by Products and Services (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 28, 2024	Jun. 30, 2023	Jun. 28, 2024	Jun. 30, 2023
Product Information [Line Items]
Total other product sales		$ (360)	$ (806)	$ (155)	$ 2,097
Total net sales		99,005	92,306	176,361	165,834
ICLs [Member]
Product Information [Line Items]
Revenue from contract with customer, excluding assessed tax		99,365	93,112	176,516	163,737
Cataract IOLs [Member]
Product Information [Line Items]
Total other product sales			40		1,516
Other surgical products [Member]
Product Information [Line Items]
Total other product sales	[1]	$ (360)	$ (846)	$ (155)	$ 581

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