Bifocal-compensating eyeglass attachment

Details Bifocal-compensating eyeglass attachment Bifocal-compensating eyeglass attachment

1996-02-20

1997-01-28

Dang, Hung

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Invertible or reversible multifocal type

351 55, 351 57, G02C 706, G02C 708

Patent

active

055982328

ABSTRACT:
An attachment for bifocal eyeglasses including at least one eyeglass lens having a first correcting region providing corrected distant-vision and a second correcting region providing corrected near-vision, the attachment including a compensating lens sized and shaped for covering the second correcting region of the eyeglass lens without substantially covering the first correcting region of the eyeglass lens and providing optical compensation for the second correcting region so that corrected distant-vision is provided over substantially all of the first and second regions of the eyeglass lens; and an attachment for attaching the compensating lens to the eyeglasses.

REFERENCES:
patent: 0712616 (1902-11-01), Strassburger
patent: 1206457 (1916-11-01), Mills
patent: 2326787 (1943-08-01), Lorig
patent: 5056906 (1991-10-01), Akiyoshi
patent: 5243366 (1993-09-01), Blevins

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