Eyeglass lens

Details Eyeglass lens Eyeglass lens

1991-06-12

1993-12-14

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

351168, 351169, G02C 702, G02C 706

Patent

active

052707466

ABSTRACT:
A lens for eyeglasses which corrects an astigmatism includes a first refracting surface and a second refracting surface. Each refracting surface has an optical center and a periphery. At least one of the refracting surfaces is divided into a first portion and a second portion in which the first portion has a variation in curvature of the lens which is greater than the variation of curvature of the second portion.

REFERENCES:
patent: 3687528 (1972-08-01), Maitenaz
patent: 4577942 (1986-03-01), Frieder et al.

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