Conditioning solution for contact lenses and a method of using the same
AssigneeCiba-Geigy Corporation
InventorsLynn C. Winterton, Kai C. Su
Life of this patent
Estimating the term…
Abstract
A contact lens conditioning solution which has a polyoxyethylene-polyoxypropylene substituted ethylenediamine nonionic surfactant (Poloxamine type) having a hydrophile-lipophile balance of seven or below and a carrier vehicle. A polyoxyethylene-polyoxypropylene nonionic surfactant (Poloxamer type) having a hydraulic-lipophile balance of seven or below and a polyoxyethylene concentration of less than about 20% by weight of the polyoxyethylene-polyoxypropylene nonionic surfactant may also be included in the solution.
Claims14
A contact lens conditioning solution which comprises a carrier vehicle and as active ingredients (a) an effective amount of up to about 1.0% (weight/volume) of a polyoxyethylene-polyoxypropylene substituted ethylenediamine nonionic surfactant (poloxamine type) having a hydrophile-lipophile balance of seven or below and having a polyoxyethylene concentration between about 10% and about 20% by weight and (b) an effective amount of up to about 1.0% (weight/volume) of a polyoxyethylene-polyoxypropylene nonionic surfactant (poloxamer type) having a hydrophile-lipophile balance of seven or below and a polyoxyethylene concentration of less than about 20% by weight of said polyoxypropylene-polyoxyethylene nonionic surfactant.
A method for conditioning a contact lens, comprising the step of contacting said lens with a solution comprising a carrier vehicle having (a) an effective amount of up to about 1.0% (weight/volume) of a polyoxyethylene-polyoxypropylene substituted ethylenediamine nonionic surfactant having a hydrophile-lipophile balance of seven or below and having a polyoxyethylene concentration between about 10% and about 20% by weight and (b) an effective amount of up to about 1.0% (weight/volume) of a polyoxyethylene-polyoxypropylene nonionic surfactant having a hydrophile-lipophile balance of seven or below and a polyoxyethylene concentration of less than about 20% by weight of said polyoxypropylene-polyoxyethylene nonionic surfactant.
Dependencies are inferred from the claim text.