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AssigneeAllergan, Inc.
InventorsJohn Y. Park, Lin Peng, Anthony J. Dziabo
Estimating the term…
Compositions and methods useful for disinfecting a contact lens are disclosed. The present methods comprise contacting a contact lens with a liquid medium containing an effective amount of an oxidative disinfectant component at conditions to effectively disinfect the contact lens. The contacting occurs in the presence of a color indicator component which is soluble in the liquid medium and is adapted to provide a color indication of the presence of the oxidative disinfectant component in the liquid medium. The color indicator component comprises an effective amount of a transition metal component which is redox active, has an oxidized state of a first color and a reduced state of a different second color and a polyanionic component in an amount effective to inhibit the staining of the contact lens by the transition metal component.
A composition comprising:
A composition comprising at least one solid item including a color indicator component which is soluble in a quantity of liquid aqueous medium containing hydrogen peroxide effective to disinfect a contact lens immersed therein and is effective to provide a color indication of the presence of hydrogen peroxide in the quantity of liquid aqueous medium, said color indicator component comprising a transition metal component which is redox active, has an oxidized state of a first color, a reduced state of a different second color and comprises a metal selected from the group consisting of ruthenium, other platinum group metals, cobalt, chromium and mixtures thereof effective to provide a color indication of the presence of hydrogen peroxide in the quantity of liquid aqueous medium, and a polyanionic component selected from the group consisting of anionic cellulose derivatives, anionic acrylic acid polymers, anionic aspartic acid polymers, anionic glutamic acid polymers, anionic alginic acid polymers, anionic dextran derivatives and mixtures thereof effective to inhibit the staining of a contact lens immersed in the quantity of liquid aqueous medium containing said color indicator component in a solubilized form by said transition metal component, the weight ratio of said polyanionic component to said transition metal component being at least about 2.
A composition comprising
A composition comprising at least one solid item including a color indicator component which is soluble in a quantity of liquid aqueous medium containing hydrogen peroxide effective to disinfect a contact lens immersed therein and is effective to provide a color indication of the presence of hydrogen peroxide in the quantity of liquid aqueous medium, said color indicator component comprising ruthenium red and a polyanionic component selected from the group consisting of anionic acrylic acid polymers, anionic aspartic acid polymers and mixtures thereof effective to inhibit the staining of a contact lens immersed in the quantity of liquid aqueous medium containing the color indicator component in a solubilized from by said ruthenium red, the weight ratio of said polyanionic component to ruthenium red being at least about 2.
Dependencies are inferred from the claim text.