Simplified method of producing cosmetic contact lenses

Details Simplified method of producing cosmetic contact lenses Simplified method of producing cosmetic contact lenses

1989-07-17

1989-09-12

Arnold, Bruce Y.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

8507, B29D 1100, G02C 704

Patent

active

048654400

ABSTRACT:
The invention is a method of making a colored cosmetic lens that will change the color of a dark colored eye to a light color. This is achieved by masking the area which are not to be colored, the pupil and periphery beyond the iris. A solution containing a contact lens dye, an expanding or swelling agent and a precipitating agent is prepared. The water soluble precipitating agent is capable of forming an insoluble precipitant when properly reacted. The lens and mask fixture are immersed in the three part solution allowing the solution to swell and enter the surface of the lens iris area. The dye and precipitating agent enter the expanded lens iris area. The lens and mask fixture are transferred from the first three part solution to the second reaction precipitating solution. A colored insoluble precipitant is formed in the lens iris area. The lens is removed from the mask fixture and washed to remove all unreacted materials.

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

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