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Geographic and Product Data (Details 1) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2015	Oct. 03, 2014	Oct. 02, 2015	Oct. 03, 2014
Product Information [Line Items]
Net sales	$ 18,750	$ 18,188	$ 56,264	$ 58,414
Other Countries [Member]
Product Information [Line Items]
Net sales	4,744	4,617	14,937	15,148
ICLs [Member]
Product Information [Line Items]
Net sales	12,907	10,640	37,396	35,052
IOLs [Member]
Product Information [Line Items]
Net sales	4,390	5,763	14,952	18,804
Core products [Member]
Product Information [Line Items]
Net sales	17,297	16,403	52,348	53,856
Other surgical products [Member]
Product Information [Line Items]
Net sales	$ 1,453	$ 1,785	$ 3,916	$ 4,558

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 225



-SubTopic 10



-Section S99



-Paragraph 2



-Subparagraph (SX 210.5-03.1)



-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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