Kit for contact lens cleaning and method for contact lens cleaning
AssigneeHoya Corporation
InventorsYoko Itagaki, Masahiro Hiranuma
Life of this patent
Estimating the term…
Abstract
Contact lenses can be cleaned effectively in a short time, by using a kit for contact lens cleaning which comprises an oxidizing agent for removing stains adhering to contact lenses and a reducing agent for making nontoxic the oxidizing agent still remaining after stain removal and wherein the oxidizing agent and the reducing agent are each in such a form that when they are placed in water substantially simultaneously, the major portion of the oxidizing agent dissolves in the water more rapidly than the major portion of the reducing agent. Further, with this kit, the cleaned contact lenses can be made nontoxic without fail.
Claims10
A kit for contact lens cleaning, comprising an oxidizing agent for removing stains adhering to contact lenses selected from the group consisting of chlorinated lime, chloramine T, chloramine B and halazone and a reducing agent for making nontoxic the oxidizing agent still remaining after stain removal selected from the group consisting of citric acid, malic acid, tartaric acid and salts thereof, wherein the oxidizing agent and the reducing agent are each in such form that they do not substantially react with each other in the kit and that, when they are placed in water substantially simultaneously, the major portion of the oxidizing agent dissolves in the water more rapidly than the major portion of the reducing agent, the oxidizing agent being in the form of powder or granules and the reducing agent being in the form of tablets or in the form of powder or granules contained within a bag or having a coating thereon.
A method for cleaning contact lenses wherein an oxidizing agent selected from the group consisting of chlorinated lime, chloramine T, chloramine B and halazone is used for removing stains adhering to said lenses and a reducing agent selected from the group consisting of citric acid, malic acid, tartaric acid and salts thereof is used to render non-toxic the residual oxidizing agent after stain removal, said oxidizing agent being in the form of a powder or granules and said reducing agent being in the form of tablets or in the form of powder or granules contained within a bag or having a coating thereon, which comprises introducing said oxidizing agent and reducing agent substantially simultaneously into water, dissolving the major portion of the oxidizing agent in the water more rapidly than the major portion of the reducing agent, immediately cleaning contact lenses in the water with the dissolved oxidizing agent, and thereafter reducing the residual oxidizing agent with the reducing agent so as to render said lenses non-toxic.
Dependencies are inferred from the claim text.