Geographic and Product Data (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 29, 2013	Mar. 30, 2012
Net sales	$ 18,001	$ 15,509
Implantable Collamer Lenses [Member]
Net sales	10,631	8,605
Intraocular Lenses [Member]
Net sales	6,347	6,358
Core Products [Member]
Net sales	16,978	14,963
Other Surgical Products [Member]
Net sales	$ 1,023	$ 546

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.

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=6880815&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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