Contact lens

Details Contact lens Contact lens

1993-10-04

1996-07-02

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

351161, G02C 704

Patent

active

055327680

ABSTRACT:
The inner and outer surfaces of a toric contact lens have respectively a curved surface having a different radius of curvature wherein the central axis of the outer surface is deviated downwardly from the central axis of the inner surface. Accordingly, the position of the gravity center of the lens is lowered because the lower portion of the lens is thicker than the upper portion. Further, slab-off portions are formed in the upper and lower portions of the outer surface of the lens. The contact lens of the present invention can prevent the rotation of the lens on the cornea, provides a good feeling to a wearer, and is safe in use.

REFERENCES:
patent: 4095878 (1978-06-01), Fanti
patent: 4324461 (1982-04-01), Salvatori
patent: 4508436 (1985-04-01), Sitterle
patent: 4573774 (1986-03-01), Sitterle
patent: 4618228 (1986-10-01), Baron et al.
patent: 4628229 (1986-10-01), Jacobstein et al.
patent: 4813777 (1989-03-01), Rainville et al.
patent: 5020898 (1991-06-01), Townsley
patent: 5076683 (1991-12-01), Glick

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