Progressive intensity phase bifocal

Details Progressive intensity phase bifocal Progressive intensity phase bifocal

1987-11-12

1989-11-21

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

35016216, 35016222, 623 6, G02C 704, G02B 518, G02B 2744, A61F 216

Patent

active

048818054

ABSTRACT:
An ophthalmic contact lens containing more than one phase plate within its optic zone, including contact lens, especially of a Cohen lens design, which possesses phase plate optics within its optic zone that progressively shift the intensity of light focussed by bifocal phase plates between the diffractive focal powers by utilizing eshelettes in the phase plates of varying depths and heights which are cooperatively aligned relative to the lens base curve surface that they openly face.

REFERENCES:
patent: 3309162 (1967-03-01), Kosanke et al.
patent: 3312519 (1967-04-01), Max
patent: 3728009 (1973-04-01), Fedotowsky et al.
patent: 4198132 (1980-04-01), Seger et al.
patent: 4340283 (1982-07-01), Cohen

Affiliated with

Also associated with

Rating

Progressive intensity phase bifocal 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 intensity phase bifocal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Progressive intensity phase bifocal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1422851