Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1996-03-19
1998-02-03
Sugarman, Scott J.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
G02C 706
Patent
active
057150320
ABSTRACT:
A progressive addition power lens having base and add spherical regions for providing refractive power correction for distance and near vision includes a central corridor characterized by a power curve expressed as a polynomial of at least the 11th degree. The surface contour of the intermediate corridor is defined by the surfaces of an ordered sequence of osculating spheres. The curvature of the surface of the intermediate region spreads away from the principal meridian in accordance with a spreading function having substantially circular level curves. Visual astigmatism is corrected over a substantial fraction of the base and add spheres by superposition of an aspheric function to the sag of the lens surface as defined by the polynomial and the spreading function.
REFERENCES:
patent: 3950082 (1976-04-01), Volk
patent: 4307945 (1981-12-01), Kitchen et al.
patent: 4514061 (1985-04-01), Winthrop
patent: 4729651 (1988-03-01), Kitani
patent: 4762408 (1988-08-01), Shinohara
patent: 4838674 (1989-06-01), Dufour
patent: 4861153 (1989-08-01), Winthrop
patent: 4869587 (1989-09-01), Breger
patent: 4934808 (1990-06-01), Kitani
patent: 4988182 (1991-01-01), Takahashi et al.
patent: 5000559 (1991-03-01), Takahashi et al.
patent: 5048945 (1991-09-01), Ueno et al.
patent: 5083859 (1992-01-01), Jalie
patent: 5110199 (1992-05-01), Ishida
patent: 5123725 (1992-06-01), Winthrop
patent: 5237181 (1993-08-01), Waido
patent: 5270745 (1993-12-01), Pedrono
patent: 5272495 (1993-12-01), Pedrono
patent: 5285222 (1994-02-01), Waido
patent: 5335026 (1994-08-01), Kato et al.
Optical Research Associates report, "Mathematical Surface Formulation".
Optical Radiation Corporation
Sugarman Scott J.
LandOfFree
Progressive addition 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 addition power ophthalmic lens, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Progressive addition power ophthalmic lens will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-667314