Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1982-06-09
1985-04-23
Frinks, Ronald L.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
351161, 351168, A61F 116, A61F 124
Patent
active
045120404
ABSTRACT:
A bifocal intraocular lens consisting of an inner and outer transparent wall defining a centrally located refractive chamber, in the line of sight, and in fluid communication with a vertically positioned reservoir chamber, out of the line of sight, wherein vent tubes connect the remote edge of the refractive chamber to the vertically positioned reservoir chamber. Such an intraocular lens is highly responsive to changes in the angle of inclination of sight by rapidly transferring a liquid of predetermined refractive index in and out of the refractive chamber, thus creating the bifocal effect.
REFERENCES:
patent: 3598479 (1971-08-01), Wright et al.
patent: 3996627 (1976-12-01), Deeg et al.
patent: 4010496 (1977-03-01), Neefe
patent: 4077071 (1978-03-01), Freeman
patent: 4079470 (1978-03-01), Deeg et al.
patent: 4174156 (1979-11-01), Glorieux
patent: 4253199 (1981-03-01), Banko
patent: 4300818 (1981-11-01), Schachar
"The Kratz Technique for Cataract Extraction with Lens Implant", (Brochure), Cilco, U.S.A., Cilco, Inc., 1616 13th Ave., Huntington, West Va. 25701, 4 pages, Mar. 20, 1981.
Lens Styles from Cilco, (Advertisement Brochure), Cilco, U.S.A., Cilco, Inc., 1616 13th Ave., Huntington, West Va. 25701, 6 pages, (Optiflex Anterior Chamber Lens on p. 2), Oct. 1982.
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