Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1975-12-10
1979-10-23
Corbin, John K.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
264 1, 351160H, G02C 704
Patent
active
041718780
ABSTRACT:
The combined contact lens is characterized in that it comprises a zone of a hydrophilic material, an aperture in the center of said zone, and a solid body from an optically transparent material fixed in said aperture, said solid body being made in the form of a rod bonded chemically with said zone.
In the method for the manufacture of the combined contact lens, a hydroxyl-containing monomer is polymerized in the presence of an agent initiating polymerization, a solvent, and a linking agent, inside a mould provided with a rod located in the center of the mould and made from a polymer that is inactive toward water but swells in the solution of the starting hydroxyl-containing monomer.
The invention provides good toleration of the lens with the patient and ensures optimum optical effect with various abnormalties of refraction and in various pathological states of the cornea.
REFERENCES:
patent: 3488111 (1970-01-01), Isen
patent: 3619044 (1971-11-01), Kamath
patent: 3728317 (1973-04-01), Blank
patent: 3786812 (1974-01-01), Neefe
patent: 3944347 (1976-03-01), Barkdoll et al.
Arbuzova Irina A.
Barkov Vladimir A.
Ezrielev Robert I.
Kivaev Anatoly A.
Corbin John K.
Sugarman Scott J.
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