Back to results
US 6,126,706 AGranted
Method of cleaning and disinfecting contact lens
AssigneeTomey Corporation
InventorsSatoru Matsumoto, Atsuko Sugiura
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeTomey Corporation
InventorsSatoru Matsumoto, Atsuko Sugiura
Estimating the term…
A method of cleaning and disinfecting a contact lens, comprising the steps of: preparing a disinfectant which is an aqueous solution containing an iodine-complex polymer, and a diluent which is an aqueous solution containing ethylenediamine tetraacetic acid and/or soluble salts thereof, and a nonionic surface active agent; mixing the disinfectant and the diluent to provide a mixed solution, such that an available iodine concentration of the mixed solution immediately after mixing is in a range of 0.01-50 ppm, and such that concentrations of the ethylenediamine tetraacetic acid and/or the soluble salts thereof, and the nonionic surface active agent in the mixed solution are in a range of 0.0001-1.0 w/v % and in a range of 0.01-1.0 w/v %, respectively; and immersing the contact lens in the mixed solution for cleaning and disinfecting the contact lens, resulting in gradual reduction of the available iodine remaining in the mixed solution, by the ethylenediamine tetraacetic acid and/or the soluble salts thereof.
A method of cleaning and disinfecting a contact lens, comprising the steps of:
A method of cleaning and disinfecting a contact lens, comprising the steps:
A method of lowering a rate of reduction of an available iodine in a mixed solution used for cleaning and disinfecting a contact lens, said mixed solution consisting of a disinfectant which is an aqueous solution containing polyvinylpyrrolidone-iodine and a diluent which is an aqueous solution containing ethylenediamine tetraacetic acid and/or soluble salts thereof, said method comprising including, in said diluent, a nonionic surface active agent selected from the group consisting of polyoxyethylene castor oil polyoxyethylene hardened or hydrogenated castor oil, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene stearate, polyoxyethylene-polyoxypropylene block copolymer and mixtures thereof,
A method of stabilizing an available iodine in a disinfectant which is an aqueous solution containing polyvinylpyrrolidone-iodine and at least one halogenated compound of alkali metal mixed with a diluent for cleaning and disinfecting a contact lens, said diluent being an aqueous solution containing ethylenediamine tetraacetic acid and/or soluble salts thereof, and a nonionic surface active agent selected from the group consisting of polyoxyethylene castor oil, polyoxyethylene hardened or hydrogenated castor oil, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene stearate, polyoxyethylene-polyoxypropylene block copolymer and mixtures thereof,
Dependencies are inferred from the claim text.