Method for cleaning contact lenses
AssigneeAllergan Pharmaceuticals, Inc.
InventorFrederick D. Kleist
Life of this patent
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Abstract
A method and composition for the treatment of contact lenses, and especially soft contact lenses such as silicone and hydrophilic plastic contact lenses to remove inorganic deposits. The method consists of treating a contact lens with an aqueous solution containing an effective amount of a sequestering agent, such as a polymetaphosphate, gluconic acid or salts thereof. A preferred polymetaphosphate is sodium hexametaphosphate.
Claims12
A method for the treatment of contact lenses to remove inorganic deposits on the lenses comprising contacting a contact lens having inorganic deposits with an aqueous solution containing an amount effective for removing inorganic deposits of a sequestering agent selected from the group consisting of hexametaphosphate, gluconic acid and salts thereof for a period of time sufficient to remove inorganic deposits.
A method for the treatment of soft contact lenses to remove calcium deposits on the lenses comprising preparing an aqueous solution by combining with water, a solid, unit dosage form of a composition consisting essentially of a sequestering agent selected from the group consisting of hexametaphosphate, gluconic acid and salts thereof and contacting a contact lens having inorganic deposits with the resulting aqueous solution at temperatures between about 40.degree. C. and about 100.degree. C. for a period of time sufficient to remove the calcium deposits on the lens.
A method for removing calcium deposits from silicone and hydrophilic soft contact lenses having calcium deposits comprising contacting a silicone or hydrophilic soft contact lens having calcium deposits at a temperature between about 40.degree. C. and about 100.degree. C. with a composition consisting essentially of from about 0.05 to about 2% by weight of sodium hexametaphosphate in an aqueous, preserved saline solution.
Dependencies are inferred from the claim text.