Extended-wear lenses

Details Extended-wear lenses Extended-wear lenses

1988-04-01

1991-03-26

Bowers, Jr., Charles L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

526245, 526246, 526279, C08F 2022, C08L 8306, G02C 704

Patent

active

050029797

ABSTRACT:
There are provided extended-wear lenses formed by polymerizing an organosilicon monomer system, at least a portion of which is a hydroxyorganosilicon monomer, a fluoroorgano monomer, a hydrophilic monomer, and a crosslinking agent. A UV-absorbing agent is optionally present. The product is easily machinable to any prescription, permitting continuous wear, with an oxygen permeability in excess of 50.times.10.sup.-11 (cm.sup.2 /sec) (ml O.sub.2 .times.mm Hg).

REFERENCES:
patent: 4139692 (1979-02-01), Tanaka et al.
patent: 4235985 (1980-11-01), Tanaka et al.
patent: 4419505 (1983-12-01), Ratkowski
patent: 4433125 (1984-02-01), Ichinohe
patent: 4829137 (1989-05-01), Stoyan

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