Tinted contact lenses and a method for their preparation

Details Tinted contact lenses and a method for their preparation Tinted contact lenses and a method for their preparation

G - Physics

02

C

8/3

G02C 7/04 (2006.01) D06P 3/00 (2006.01) G02B 1/04 (2006.01) G02C 7/02 (2006.01)

Patent

CA 1190708

ABSTRACT OF THE DISCLOSURE Tinted contact lenses and a method for their preparation Contact lenses comprising polymeric lens materials in which reactive dyestuffs have been covalently bonded to monomer units of the polymer backbone, said dyestuffs being reactive dyes capable of forming ether linkages with cellulose, and being reactive with hydroxyl, amino, amido or mercapto groups present in a hydrogel polymer to form the covalent bond therewith. The invention is of particular interest in the area of "soft" contact lenses (hydrogel lenses).

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