Contact lens preservative system cleaner and method
AssigneeSherman Laboratories, Inc.
InventorGuy J. Sherman
Life of this patent
Estimating the term…
Abstract
Preservative systems which may be incorporated into aqueous compositions for the daily cleaning of silicone copolymer (gas-permeable) and soft contact lenses are provided. The preservative system may comprise solely trimethoprim. Adjuvant bactericides may also be present, such as a salt of EDTA, sorbic acid, ascorbic acid or benzyl alcohol. One suitable cleaning composition which incorporates the preservative system includes three types of detergents. The cleaning composition is effective in removing both proteins and lipids and calcium from the surfaces of soft contact lenses and aids in preventing deposits from forming and binding to the lenses.
Claims14
A contact lens cleaning composition comprising:
- (a) trimethoprim, present in an effective amount for maintaining the sterility of the composition;
- and
- (b) at least one cleaning component suitable for cleaning contact lenses.
A method of maintaining the sterility of a contact lens cleaning composition comprising providing trimethoprim in the composition, said trimethoprim present in an effective amount for maintaining the sterility of the composition.
Dependencies are inferred from the claim text.