Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1995-07-27
1997-11-25
Sugarman, Scott J.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
351177, G02C 706
Patent
active
056917988
ABSTRACT:
A progressive power ophthalmic lens having a spherical distance viewing area, a progressive power portion with a decreasing radius of curvature along an umbilic meridian, and a spherical near viewing area. Power distribution functions are optimized for smooth transition along the principal directions of gaze. A statistically smoothed polynomial function of the general form Pm=b.sub.1 +b.sub.2 X+b.sub.3 X.sup.2 +. . . +b.sub.9 X.sup.8 defines the mean power at any point on the lens surface to regulate curvature variation. Thereby providing continuity of the visual field at the boundaries of the principal lens zones and creating an integrated visual field as the eye traverses the lens.
REFERENCES:
patent: 2878721 (1959-03-01), Kanolt
patent: 3010366 (1961-11-01), Crawford
patent: 3687528 (1972-08-01), Maitenaz
patent: 3785724 (1974-01-01), Cretin-Maitenaz
patent: 3797922 (1974-03-01), Plummer
patent: 4056311 (1977-11-01), Winthrop
patent: 4240719 (1980-12-01), Guilino et al.
patent: 4253747 (1981-03-01), Maitenaz
patent: 4315673 (1982-02-01), Guilino et al.
patent: 4418992 (1983-12-01), Davenport et al.
patent: 4461550 (1984-07-01), Legendre
patent: 4514061 (1985-04-01), Winthrop
patent: 4592630 (1986-06-01), Okazaki
patent: 4606622 (1986-08-01), Fueter et al.
patent: 4676610 (1987-06-01), Barkan et al.
patent: 4784482 (1988-11-01), Guilino
patent: 4796988 (1989-01-01), Dufour et al.
patent: 4838674 (1989-06-01), Dufour
patent: 4838675 (1989-06-01), Barkan et al.
patent: 4861153 (1989-08-01), Winthrop
patent: 4934808 (1990-06-01), Kitani
patent: 4946270 (1990-08-01), Guilino et al.
patent: 4950057 (1990-08-01), Shirayanagi
patent: 4952047 (1990-08-01), Barth et al.
patent: 4988182 (1991-01-01), Takahashi et al.
patent: 5042936 (1991-08-01), Guilino et al.
patent: 5048945 (1991-09-01), Ueno et al.
patent: 5123725 (1992-06-01), Winthrop
patent: 5137343 (1992-08-01), Kelch et al.
patent: 5166711 (1992-11-01), Portney
patent: 5270744 (1993-12-01), Portney
patent: 5270745 (1993-12-01), Pedrono
patent: 5305028 (1994-04-01), Okano
Schwartz Jordan
Sugarman Scott J.
Teijin Chemicals Ltd.
LandOfFree
Progressive power ophthalmic lens 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 power ophthalmic lens, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Progressive power ophthalmic lens will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2111424