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

1984-08-20

1985-12-17

Clingman, A. Lionel

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

8549, 8543, 351162, 427164, D06P 500

Patent

active

045590591

ABSTRACT:
Contact lenses comprising polymeric lens materials in which reactive dyestuffs have been covalently bonded to monomer units of the polymer backbone, said reactive dyestuffs being reactive dyes capable of forming ether linkages with cellulose and 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 so-called hydrophilic or "soft" contact lenses, commonly referred to as hydrogel lenses.

REFERENCES:
patent: 4252421 (1981-02-01), Foley
patent: 4447474 (1984-05-01), Neefe
patent: 4468229 (1984-08-01), Su
patent: 4494954 (1985-01-01), Suminde et al.

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