Chemical treatment to improve oxygen permeability through and pr

Details Chemical treatment to improve oxygen permeability through and pr Chemical treatment to improve oxygen permeability through and pr

1992-09-01

1994-05-10

Beck, Shrive

Coating processes

Medical or dental purpose product; parts; subcombinations;...

Particulate or unit-dosage-article base

4272551, 351160H, 525937, 523107, G02C 704

Patent

active

053105710

ABSTRACT:
A method for treating hydrophilic and rigid gas permeable contact lenses, as well as the manufacture of protein adhesion resistant and gas permeable enhanced lenses, is obtained through purging the hydrated contact lens, formed from polymer comprising hydrogen atoms, substantially all water and oxygen, and thereafter exposing the purged contact lens to a fluorine-containing gas in non-plasma conditions for a period of time and at a temperature sufficient to replace hydrogen atoms in the polymer in order to inhibit protein deposits on the contact lens. The conditions of fluorine exposure can be controlled in order to provide a gas permeable enhanced contact lens.

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