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
	September 27, 2019		September 28, 2018		September 27, 2019		September 28, 2018
Non-consignment sales	$	34,696	$	27,503	$	98,518	$	79,345
Consignment sales		4,359		4,267		12,784		13,423
Total net sales	$	39,055	$	31,770	$	111,302	$	92,768

Note 14 — Disaggregation of Sales, Geographic Sales and Product Sales (Continued)

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 is set forth below (in thousands):

	Three Months Ended				Nine Months Ended
	September 27, 2019		September 28, 2018		September 27, 2019		September 28, 2018
China	$	18,361	$	13,349	$	49,526	$	35,224
Japan		7,345		6,006		19,139		17,781
Other⁽¹⁾		13,349		12,415		42,637		39,763
Total net sales	$	39,055	$	31,770	$	111,302	$	92,768

	Three Months Ended				Nine Months Ended
	September 27, 2019		September 28, 2018		September 27, 2019		September 28, 2018
Domestic	$	1,783	$	1,676	$	5,849	$	5,327
Foreign		37,272		30,094		105,453		87,441
Total net sales	$	39,055	$	31,770	$	111,302	$	92,768

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 is as follows (in thousands):

	Three Months Ended				Nine Months Ended
	September 27, 2019		September 28, 2018		September 27, 2019		September 28, 2018
ICLs	$	33,815	$	26,418	$	96,033	$	74,868
Other product sales
IOLs		4,093		3,824		11,984		12,068
Other surgical products		1,147		1,528		3,285		5,832
Total other product sales		5,240		5,352		15,269		17,900
Total net sales	$	39,055	$	31,770	$	111,302	$	92,768

One customer, the Company’s distributor in China, accounted for 47% and 44% of net sales for the three and nine months ended September 27, 2019, respectively, and the same customer accounted for 42% and 38% of net sales for the three and nine months ended September 28, 2018, respectively. As of September 27, 2019 and December 28, 2018, respectively, one customer, the Company’s distributor in China, accounted for 40% and 37% of consolidated trade receivables.