Lens for eyeglasses in which plurality of lenses formed of curve

Details Lens for eyeglasses in which plurality of lenses formed of curve Lens for eyeglasses in which plurality of lenses formed of curve

1993-09-08

1995-10-10

Sikes, William L.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

With antiglare or shading

351 41, 351 62, 351159, 2447, D16313, G02C 702, G02C 710

Patent

active

054575028

ABSTRACT:
Upper lens formed of a portion of a sphere having radius R.sub.2 and lower lens formed of a portion of a sphere having radius R.sub.1 are manufactured integrally by molding for forming the lens of eyeglasses Radii R.sub.1 and R.sub.2 are slightly different from each other, so that the front view comes into eyes through lower lens when the user is in a normal posture, while the front view comes into eyes through upper lens when the user bends forward.

REFERENCES:
patent: 1991544 (1935-02-01), Courmettes
patent: 2139275 (1938-12-01), Lee
patent: 2256966 (1941-09-01), Simonten
patent: 2276102 (1942-03-01), Schwartz
patent: 2645774 (1953-07-01), Dale, Jr.
patent: 3133982 (1964-05-01), Janz
patent: 3826564 (1974-07-01), Werling, Sr.
patent: 4859048 (1989-08-01), Jannard
patent: 4964714 (1990-10-01), Weymouth, Jr. et al.
Bugbee, L. W. and L. W. Bugbee Jr., Bifocals Onepiece Bifocal Lens Co., Indianapolis, Ind. 1923, pp. 8-14.
European Search Report dated Nov. 26, 1993.

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