In the following tables, sales are disaggregated by category, sales by geographic market and sales by product data. The following breaks down sales into the following categories (in thousands):

	Three Months Ended
	April 1, 2022		April 2, 2021
Non-consignment sales	$	57,569	$	45,417
Consignment sales		5,631		5,335
Total net sales	$	63,200	$	50,752

The Company markets and sells its products in over 75 countries and conducts its manufacturing in the United States. Other than China and Japan, the Company does not conduct business in any country in which its sales exceed 10% of worldwide consolidated net sales. Sales are attributed to countries based on location of customers. The composition of the Company’s net sales to unaffiliated customers was as follows (in thousands):

	Three Months Ended
	April 1, 2022		April 2, 2021
Domestic	$	2,630	$	2,340
Foreign:
China		28,239		19,643
Japan		11,633		9,603
Other⁽¹⁾		20,698		19,166
Total foreign sales		60,570		48,412
Total net sales	$	63,200	$	50,752

100% of the Company’s sales are generated from the ophthalmic surgical product segment and the chief operating decision maker makes operating decisions and allocates resources based upon the consolidated operating results, and therefore the Company operates as one operating segment for financial reporting purposes. The Company’s principal products are implantable Collamer lenses (“ICLs”) used in refractive surgery and intraocular lenses (“IOLs”) used in cataract surgery. The composition of the Company’s net sales by product line was as follows (in thousands):

	Three Months Ended
	April 1, 2022		April 2, 2021
ICLs	$	58,675	$	46,501
Other product sales:
Cataract IOLs		2,902		3,725
Other surgical products		1,623		526
Total other product sales		4,525		4,251
Total net sales	$	63,200	$	50,752

One customer, the Company’s distributor in China, accounted for 45% and 39% of net sales for the three ended April 1, 2022 and April 2, 2021, respectively. As of April 1, 2022 and December 31, 2021, respectively, one customer, the Company’s distributor in China, accounted for 50% and 47% of consolidated trade receivables.