Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1988-01-06
1990-01-16
Arnold, Bruce Y.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
351160R, G02C 704
Patent
active
048939188
ABSTRACT:
Contact lens or intraocular lens from lightly crosslinked polymer of 2-hydroxyethyl methacrylate or from such its copolymer, where the 2-hydroxyethyl methacrylate component prevails over the second nonhydrophilic component, which contains a hydrophilic swellable transparent surface layer and an inner portion of lower swellability than the surface layer, whereby the swellability of the surface layer decreases continuously from the exterior of the surface layer towards the inner portion to the swellability level of the inner portion.
The swellability of the exterior of the surface layer is at the surface layer of up to 98% and the thickness of the surface layer is at utmost 100 .mu.m.
The finally shaped lense is treated with an alkaline reacting solution of a salt, in which the lens does not swell and the lens is then freed of all soluble substances by washing.
REFERENCES:
patent: 3925178 (1975-12-01), Gesser et al.
patent: 3948871 (1976-04-01), Butterfield, Jr. et al.
patent: 3964973 (1976-06-01), Hradil et al.
patent: 3978164 (1976-08-01), Le Boeuf et al.
patent: 3988274 (1976-10-01), Masuhara et al.
patent: 4054624 (1977-10-01), Le Boeuf et al.
patent: 4107121 (1978-08-01), Stoy
patent: 4121885 (1978-10-01), Erickson et al.
patent: 4131696 (1978-12-01), Covington
patent: 4143949 (1979-03-01), Chen
patent: 4163608 (1979-08-01), Neefe
patent: 4166255 (1979-08-01), Graham
patent: 4168112 (1979-09-01), Ellis et al.
patent: 4208362 (1980-06-01), Deichert et al.
patent: 4284749 (1981-08-01), Neefe
patent: 4338419 (1982-07-01), Korb et al.
patent: 4379893 (1983-04-01), O'Malley et al.
patent: 4569858 (1986-02-01), Lim et al.
patent: 4687816 (1987-08-01), Lin et al.
patent: 4734475 (1988-03-01), Goldenberg et al.
Krcova Zuzna
Sulc Jiri
Arnold Bruce Y.
Callaghan Terry S.
Ceskoslovenska akademie ved
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