Barnes-hind Pharmaceuticals, Inc.

Barnes-hind, Inc.

Gordon H Yung

Murray J Sibley

Petronio D Urrea

Hans H Kaspar

A contact lens is disinfected in an aqueous H.sub.2 O.sub.2 solution. The H.sub.2 O.sub.2 solution is neutralized and transformed in situ into a buffered, saline storage solution by adding a neutralizer such as sodium sulfite or sodium thiosulfate, and optional buffering agents. The neutralizer has a coating which dissolves to release the ingredients only a period of time after it is added, so that it can be put into the H.sub.2 O.sub.2 solution at the same time that the lens is.

Disinfection of contact lenses

Method and compositions are provided for the effective cleaning of soft and silicone contact lenses by soaking the lenses for a time sufficient to remove adherent residues in a solution containing an epoxy modified silicone surfactant and a fatty acid amide (or nitrogen analog thereof) surfactant, which may be cationic or non-ionic. Other additives may also be included such as thickening agents, bactericides, salts, anionic surfactants, and the like. The compositions are found to be particularly effective in removing strongly adhering proteinaceous matter, as well as lipids and polysaccharides. By employing a particular combination of surfactants, soft contact lenses can be freed of impurities and adhering matter introduced during manufacture of the lens, while the lens is being hydrated. The lens is soaked under moderate conditions in an aqueous saline bath with a combination of a zwitterion surfactant and a fatty acid amide surfactant.

Cleaning agents for contact lenses

Method and compositions are provided for elevated temperature disinfection of soft contact lenses. The lenses are heated at a temperature and for a time sufficient to provide disinfection in an aqueous stabilized saline solution having a small amount of a non-eye-irritating neutral surfactant. Particularly effective are N-hydroxyalkylated fatty acid amides.

Composition and method treating soft contact lenses at elevated

Compositions are provided for the effective cleaning of soft and silicone contact lenses by soaking the lenses for a time sufficient to remove adherent residues in a solution containing an epoxy modified silicone surfactant and a fatty acid amide (or nitrogen analog thereof) surfactant, which may be cationic or non-ionic. Other additives may also be included such as thickening agents, bactericides, salts, anionic surfactants, and the like. The compositions are found to be particularly effective in removing strongly adhering proteinaceous matter, as well as lipids and polysaccharides.

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Sunnyvale, CA, United States of America

Gordon H Yung