Use of pluronic surfactant to enhance the cleaning effect of pancreatin on contact lenses
AssigneeAlcon Laboratories, Inc.
InventorRolf Schafer
Life of this patent
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Abstract
A contact lens cleaning solution containing an enzyme having proteolytic activity and a surfactant, and optionally also a chelating agent and urea, and a method of cleaning contact lenses utilizing this solution are described. The solution and method effectively remove deposits of proteinaceous material, mucins, lipids and calcium located either on or beneath the surface of the lens.
Claims1
In a method of removing protein and lipid deposits from a contact lens by means of soaking the lens in a solution containing 0.01 to 5.0 weight/volume percent pancreatin, the improvement which comprises including in the solution 0.02 to 1.0 weight/volume percent of a nonionic surfactant which comprises a block polymer of propylene oxide and ethylene oxide having the following structure:
- ##STR4## wherein x and y are whole numbers greater than zero and the molecular weight of the surfactant is in the range of 1,039 to 4,684.
Dependencies are inferred from the claim text.