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US 5,462,713 AGranted
Double redox system for disinfecting contact lenses
AssigneeAlcon Laboratories, Inc.
InventorsRonald L. Schlitzer, N. L. Dassanayake, Rajkumar P. Bhatia
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Abstract
An improved method for rapid disinfection of contact lenses in a convenient and reliable manner is disclosed in which a series of oxidation-reduction reactions are employed. Specifically, dicheoroisocyanurate and potassium iodide react to form iodine species for disinfecting the contact lens. An amount of ascorbate is then added to neutralize the iodine species.
Claims8
An improved method for rapidly and effectively disinfecting a contact lens, comprising:
- (a) providing a contact lens to be disinfected;
- (b) placing the lens in an aqueous solution;
- (c) providing a water soluble salt of dichloroisocyanurate as a source of hypochlorite and providing a source of a water soluble iodide salt;
- (d) forming a disinfecting solution by releasing an antimicrobial effective amount of hypochlorite and iodide in said aqueous solution, said hypochlorite and iodide reacting to form halogen species including iodine species, whereby the lens is rapidly and effectively disinfected by the combined actions of the hypochlorite and the halogen species;
- (e) providing a source of ascorbate;
- and
- (f) releasing an amount of ascorbate in said disinfecting solution sufficient to neutralize said iodine species.
4 more elements
Dependencies are inferred from the claim text.