Method of stabilizing preparations for contact lenses

Details Method of stabilizing preparations for contact lenses Method of stabilizing preparations for contact lenses

C - Chemistry, Metallurgy

11

D

C11D 3/26 (2006.01) C11D 1/94 (2006.01) C11D 3/00 (2006.01) C11D 3/386 (2006.01) G02C 13/00 (2006.01)

Patent

CA 2137578

- 19 - Abstract With a specific aim to preventing the proteolytic enzyme in a preparation for contact lenses containing a proteolytic enzyme from deterioration in the state of aqueous solution, the present invention provides (1) a method of stabilizing a preparation for contact lenses containing a proteolytic enzyme, which comprises formulating the said preparation with a pyrrolidone compound, (2) a process for producing a preparation for contact lenses and (3) a preparation for contact lenses. The preparation according to the present invention can be processed into the liquid or solid preparation form, wherein the liquid preparation can be processed into a one- component type preparation. The liquid preparation as well as the solid preparation, even after being dissolved in water, can maintain the activity of the proteolytic enzyme over a prolonged period of time, and can be used effectively for cleansing and cleaning, preservation and sterilization of contact lenses.

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