Progressive addition lenses having regressive surfaces

Details Progressive addition lenses having regressive surfaces Progressive addition lenses having regressive surfaces

1999-02-04

2000-10-31

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

351177, G02C 706

Patent

active

061391484

ABSTRACT:
The invention provides progressive lenses with reduced unwanted astigmatism obtained by combining progressive addition and regressive surfaces. The unwanted astigmatisms of the progressive and regressive surfaces act to cancel each other. Thus, the lens has reduced unwanted astigmatism compared to prior art lenses of comparable dioptric add power.

REFERENCES:
patent: 4906090 (1990-03-01), Barth
patent: 5644374 (1997-07-01), Mukaiyama et al.
patent: 5691798 (1997-11-01), Smith
patent: 5726734 (1998-03-01), Winthrop
patent: 5771089 (1998-06-01), Barth
patent: 5926250 (1999-07-01), Mukaiyama et al.

Affiliated with

Also associated with

Rating

Progressive addition lenses having regressive surfaces does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Progressive addition lenses having regressive surfaces, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Progressive addition lenses having regressive surfaces will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2043966