Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1997-03-05
1999-03-02
Sugarman, Scott J.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
351177, 623 6, G02C 704, A61F 216
Patent
active
058778390
ABSTRACT:
An improved opthalmic lens is disclosed which has a plurality of alternating power zones with a continuously varying power within each zone, as well as in transition from one zone to another. In other words, a plurality of concentric zones (at least two) are provided in which the variation from far to near vision correction is continuous, i.e., from near correction focal power to far correction focal power, then back to near, and again back to far, or vice versa. This change is continuous (progressive), without any abrupt correction changes, or "edges".
Two versions of the invention are disclosed. In the first version continuous, alternating power variation is accomplished by a continuously changing curvature of the lens posterior surface, thereby altering the angle of impact of light rays on the eye.
In the second version continuous, alternating power variation is accomplished by creating non-homogeneous surface characteristics having refractive material indexes which continuously vary in the lens radial direction (out from the optical axis).
REFERENCES:
patent: Re25286 (1962-11-01), DeCarle
patent: 1483509 (1924-02-01), Bugbee
patent: 2123305 (1938-09-01), Feinbloom
patent: 2274142 (1942-02-01), Houchin
patent: 2405989 (1946-08-01), Beach
patent: 2511517 (1950-06-01), Spiegel
patent: 3004470 (1961-10-01), Ruhle
patent: 3031927 (1962-05-01), Wesley
patent: 3034403 (1962-05-01), Neefe
patent: 3210894 (1965-10-01), Bentley
patent: 3227507 (1966-01-01), Feinbloom
patent: 3339997 (1967-09-01), Wesley
patent: 3420006 (1969-01-01), Barnett
patent: 3431327 (1969-03-01), Tsuetaki
patent: 3482906 (1969-12-01), Volk
patent: 3542461 (1970-11-01), Girard et al.
patent: 3610924 (1971-10-01), Sinai
patent: 3693301 (1972-09-01), Lemaltre
patent: 3794414 (1974-02-01), Wesley
patent: 3932148 (1976-01-01), Krewalk, Sr.
patent: 4055378 (1977-10-01), Feneberg et al.
patent: 4062629 (1977-12-01), Winthrop
patent: 4073579 (1978-02-01), Deeg et al.
patent: 4162122 (1979-07-01), Cohen
patent: 4195919 (1980-04-01), Shelton
patent: 4199231 (1980-04-01), Evans
patent: 4210391 (1980-07-01), Cohen
patent: 4240719 (1980-12-01), Guilino et al.
patent: 4274717 (1981-06-01), Davenport
patent: 4307945 (1981-12-01), Kitchen et al.
patent: 4315673 (1982-02-01), Guilino et al.
patent: 4338005 (1982-07-01), Cohen
patent: 4340283 (1982-07-01), Cohen
patent: 4377329 (1983-03-01), Polar
patent: 4402579 (1983-09-01), Polar
patent: 4418991 (1983-12-01), Breger
patent: 4504982 (1985-03-01), Burk
patent: 4573775 (1986-03-01), Bayshore
patent: 4580882 (1986-04-01), Nuchman et al.
patent: 4596578 (1986-06-01), Kelman
patent: 4618228 (1986-10-01), Baron et al.
patent: 4618229 (1986-10-01), Jacobstein et al.
patent: 4635049 (1987-01-01), Blaker
patent: 4636211 (1987-01-01), Nielsen et al.
patent: 4637697 (1987-01-01), Freeman
patent: 4641934 (1987-02-01), Freeman
patent: 4693572 (1987-09-01), Tsuetaki et al.
patent: 4704016 (1987-11-01), de Carle
patent: 4720286 (1988-01-01), Bailey et al.
patent: 4752123 (1988-06-01), Blaker
patent: 4759762 (1988-07-01), Grendahl
patent: 4813955 (1989-03-01), Achatz et al.
patent: 4890912 (1990-01-01), Visser
patent: 4890913 (1990-01-01), DeCarle
patent: 4898461 (1990-02-01), Portney
patent: 5166711 (1992-11-01), Portney
patent: 5166712 (1992-11-01), Portney
patent: 5225858 (1993-07-01), Portney
patent: 5270744 (1993-12-01), Portney
"The Shah Bifocal Intraocular Lens Implant", Shah & Shah Intraocular Lens Laboratories, Calcutta, India.
Contact Lens Practice, 1998, pp. 211, 212, 403, 404, 491 and 792.
Encyclopedia of Contact Lens Practice, Sep. 1, 1960, pp. 24-26.
Further Developments of Bifocal Contact Lenses, Aug. 1959, pp. 185-186.
Sugarman Scott J.
Uxa Frank J.
LandOfFree
Multifocal 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 Multifocal ophthalmic lens, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multifocal ophthalmic lens will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-427569