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Geographic and Product Data (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 04, 2014	Jun. 28, 2013	Jul. 04, 2014	Jun. 28, 2013
Product Information [Line Items]
Net sales	$ 20,048	$ 18,164	$ 40,226	$ 36,165
Implantable Collamer Lenses [Member]
Product Information [Line Items]
Net sales	12,172	11,261	24,413	21,892
Intraocular Lenses [Member]
Product Information [Line Items]
Net sales	6,428	5,863	13,041	12,211
Core products [Member]
Product Information [Line Items]
Net sales	18,600	17,124	37,454	34,103
Other surgical products [Member]
Product Information [Line Items]
Net sales	$ 1,448	$ 1,040	$ 2,772	$ 2,062

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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



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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