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				Nine Months Ended
	October 1, 2021		October 2, 2020		October 1, 2021		October 2, 2020
Non-consignment sales	$	53,819	$	42,535	$	156,604	$	96,381
Consignment sales		4,533		4,546		14,867		21,081
Total net sales	$	58,352	$	47,081	$	171,471	$	117,462

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				Nine Months Ended
	October 1, 2021		October 2, 2020		October 1, 2021		October 2, 2020
Domestic	$	2,385	$	1,477	$	7,429	$	4,098
Foreign:
China		28,411		23,301		80,984		53,619
Japan		10,488		9,208		29,374		24,973
Other⁽¹⁾		17,068		13,095		53,684		34,772
Total foreign sales		55,967		45,604		164,042		113,364
Total net sales	$	58,352	$	47,081	$	171,471	$	117,462

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				Nine Months Ended
	October 1, 2021		October 2, 2020		October 1, 2021		October 2, 2020
ICLs	$	54,153	$	41,493	$	159,889	$	101,561
Other product sales:
Cataract IOLs		2,525		3,325		9,324		9,880
Other surgical products		1,674		2,263		2,258		6,021
Total other product sales		4,199		5,588		11,582		15,901
Total net sales	$	58,352	$	47,081	$	171,471	$	117,462

One customer, the Company’s distributor in China, accounted for 49% and 47% of net sales for the three and nine months ended October 1, 2021 and the same customer, accounted for 49% and 46% for the three and nine months ended October 2, 2020, respectively. As of October 1, 2021 and January 1, 2021, respectively, one customer, the Company’s distributor in China, accounted for 47% and 46% of consolidated trade receivables.