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				Six Months Ended
	July 1, 2022		July 2, 2021		July 1, 2022		July 2, 2021
Non-consignment sales	$	76,444	$	57,368	$	134,013	$	102,785
Consignment sales		4,657		4,999		10,288		10,334
Total net sales	$	81,101	$	62,367	$	144,301	$	113,119

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				Six Months Ended
	July 1, 2022		July 2, 2021		July 1, 2022		July 2, 2021
Domestic	$	3,872	$	2,704	$	6,502	$	5,044
Foreign:
China		46,150		32,930		74,389		52,573
Japan		10,302		9,283		21,935		18,886
Other⁽¹⁾		20,777		17,450		41,475		36,616
Total foreign sales		77,229		59,663		137,799		108,075
Total net sales	$	81,101	$	62,367	$	144,301	$	113,119

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				Six Months Ended
	July 1, 2022		July 2, 2021		July 1, 2022		July 2, 2021
ICLs	$	77,922	$	59,235	$	136,597	$	105,736
Other product sales:
Cataract IOLs		2,547		3,074		5,449		6,799
Other surgical products		632		58		2,255		584
Total other product sales		3,179		3,132		7,704		7,383
Total net sales	$	81,101	$	62,367	$	144,301	$	113,119

One customer, the Company’s distributor in China, accounted for 57% and 53% of net sales for the three months ended July 1, 2022 and July 2, 2021, respectively, and the same customer accounted for 52% and 46% for the six months ended July 1, 2022 and July 2, 2021, respectively. As of July 1, 2022 and December 31, 2021, respectively, one customer, the Company’s distributor in China, accounted for 60% and 47% of consolidated trade receivables.