Patricia Ann Knight

US Patent:

41706617, Oct 9, 1979

Filed:

Nov 30, 1977

Appl. No.:

5/855962

Inventors:

Patricia M. Knight - Costa Mesa CA
William J. Link - Irvine CA

Assignee:

American Hospital Supply Corporation - Evanston IL

International Classification:

A61F 900
B05D 300
B05D 118

US Classification:

427 2

Abstract:

A method of treating an intraocular lens or ophthalmic surgical tool with a water-soluble adherent film forming material, such as polyvinyl alcohol, in a liquid media after which the liquid media is evaporatively removed to provide a dehydrated coating that is both water-soluble and liquid swellable. The device is packaged and sterilized, such as by ethylene oxide, and supplied to the ophthalmologist. Immediately prior to its use in surgery, the ophthalmologist rehydrates the coating by submerging in a sterile aqueous bath causing the coating to swell into a soft sluffable cushion for protecting a corneal endothelium during both static touch contact and dynamic sliding contact with the coated lens or tool.

US Patent:

41700430, Oct 9, 1979

Filed:

Nov 30, 1977

Appl. No.:

5/855961

Inventors:

Patricia M. Knight - Costa Mesa CA
William J. Link - Irvine CA

Assignee:

American Hospital Supply Corporation - Evanston IL

International Classification:

A61F 116
A61F 900
A61F 124
A61B 1728

US Classification:

3 13

Abstract:

An intraocular lens or surgical tool used for eye surgery which is covered with a biocompatible water-soluble adherent film coating that has a very slow dissolution rate which maintains at least 40% of the coating on the lens for at least 30 minutes, but not more than 24 hours, when submerged in an aqueous media simulating the surgical environment. Polyvinyl alcohol is an example of such coating that is dissolvable in water and provides swellable outer portions of the coating that are sluffable so as to be self-sacrificing in protecting against both static and sliding contact with a corneal endothelium.