Method of making an improved dyed color change contact lens

Details Method of making an improved dyed color change contact lens Method of making an improved dyed color change contact lens

1988-08-11

1990-02-20

Arnold, Bruce Y.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

8507, G02B 704

Patent

active

049030523

ABSTRACT:
The invention is a method of making a cosmetic contact lens that changes the apparent color of the eye. This is accomplished by dying the iris area of the convex lens surface the desired transparent color. The convex surface is expanded by a swelling agent. The swelling agent increases the pore size allowing the precipitating solution to move deeper into the convex lens surface below the dyed surface layer. The precipitating solution is reacted to form an insoluble light reflecting layer. When the lens is placed on the eye, the opaque light reflecting layer is viewed through the transparent dyed surface layer changing the apparent color of the eye.

REFERENCES:
patent: 3476499 (1969-11-01), Wichterle
patent: 3557261 (1971-01-01), Wichterle
patent: 4460523 (1984-07-01), Neefe

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