Astigmia correcting eyeglasses

Details Astigmia correcting eyeglasses Astigmia correcting eyeglasses

2009-02-11

2010-12-28

Schwartz, Jordan M. (Department: 2873)

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

C351S046000, C351S163000

Reexamination Certificate

active

07857448

ABSTRACT:
An astigmia correcting eyeglasses includes two non-transparent lenses respectively provided with a plurality of cone-shaped through holes. The cone-shaped through holes respectively have a larger diameter at an inner side than that at an outer side. The cone-shaped through holes located nearer the circumference of the lens have a larger inclined angle at the side near the circumference of the lens than those located in the center portion of the lens. Therefore the focusing function is intensified by the cone-shaped through holes, which does not obstruct the viewing lines of a user, so that there may not occur dead angles, or blind spots in using the astigmia correcting eyeglasses according to the invention.

REFERENCES:
patent: 4452516 (1984-06-01), Salia-Munoz
patent: 4749272 (1988-06-01), Salia
patent: 4958922 (1990-09-01), Binh et al.
patent: 4989967 (1991-02-01), Matsuda
patent: 5485227 (1996-01-01), Lin
patent: 2008/0273164 (2008-11-01), Shuster

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