Aspheric spectacle lens blank

Details Aspheric spectacle lens blank Aspheric spectacle lens blank

1984-03-08

1985-09-03

Corbin, John K.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

350432, G02B 304, G02C 702

Patent

active

045388873

ABSTRACT:
The present invention provides a spectacle lens blank for an aphakic eye and which is adapted to be positioned at a predetermined position in front of the eye. The lens blank includes a lens body having a posterior surface and an anterior surface. The anterior surface is aspherical from its center and to its outer periphery and the radius of curvature of the anterior surface is formed with a variable diopter gradient which is proportional to the distance between the eye and the anterior surface when the lens blank is at its predetermined position. Preferably, the lens power decreases six diopters from the center and to the outer periphery of the lens blank. In use, the lens blank of the present invention provides a wide field of central and peripheral vision for a person following extra-capsular surgery.

REFERENCES:
patent: 4181409 (1980-01-01), Whitney et al.
patent: 4185897 (1980-01-01), Frieder

Affiliated with

Also associated with

Rating

Aspheric spectacle lens blank does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Aspheric spectacle lens blank, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Aspheric spectacle lens blank will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-610655