Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1998-04-03
1999-10-26
Sugarman, Scott J.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
G02C 704
Patent
active
059715421
ABSTRACT:
A multifocal contact lens has a substantially spherical lens body that has a substantially convex outer surface, a substantially concave inner surface, and an optical central point, with a horizontal and a vertical axis that intersect in the optical central point. These axes are horizontal and vertical in the sense that the lens being worn on a human eye is in a usually upright position. The lens has a centrally arranged optical zone, a lens outer region, and an rim region, and at least two thickened regions arranged on the outer lens region, between the optical zone and the rim region and laterally of the vertical mid-axis, for setting a given orientation of the contact lens relative to the human eye. A prescribed near vision value, at least in a lower visual region, and a prescribed far vision value in an upper visual region are distributed on the surface of the lens body. The transition between the visual regions is smoothed, and each of the visual regions is individually corrected, at least for spherical aberration, independently of the other visual region.
REFERENCES:
patent: 3684357 (1972-08-01), Tsuetaki
patent: 3726587 (1973-04-01), Kendall
patent: 4693572 (1987-09-01), Tsuetaki et al.
patent: 4854089 (1989-08-01), Morales
patent: 5100225 (1992-03-01), Rothe
patent: 5151723 (1992-09-01), Tajiri
patent: 5500695 (1996-03-01), Newman
Grimmenstein Klaus
Rothe Eckhard
Volker Malchow
Carl-Zeiss-Stiftung
Sugarman Scott J.
LandOfFree
Multifocal contact 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 Multifocal contact lens, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multifocal contact lens will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-755747