Ionic ophthalmic solutions
AssigneePolymer Technology Corporation
InventorsEdward J. Ellis, Joseph C. Salamone
Life of this patent
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Abstract
A contact lens solution is provided for wetting, soaking and lubricating of hard contact lenses, particularly those carrying an ionic charge. The solution contains an ionic polymer of cationic or anionic charge that interacts with an oppositely charged surface of a contact lens forming an interfacial polyelectrolyte complex. This polyelectrolyte complex provides increased, long lasting lens wettability leading to a cushioning and lubricating effect with the eyelid and the cornea.
Claims8
A lens solution for treating contact lens surfaces to form a protective coating thereon,
- said lens solution consisting essentially of a cationic polymer in solution with said polymer being present in an amount of from 0.001 to 10% by weight of said solution,
- said solution being useful to form protective coatings on lens surfaces formed of oppositely charged materials by producing a thin coating of a hydrogel when contacted with said contact lens surface,
- said lens solution having a pH in the range of 6 to 8.
A sterile artificial tear solution for treating contact lens surfaces to form a protective coating thereon,
- said lens solution having a pH in the range of 6 to 8 and consisting essentially of a cationic cellulosic polymer in aqueous solution with said polymer being present in an amount sufficient to form a thin hydrogel coating on a lens surface of opposite charge.
A sterile lens solution for treating contact lens surfaces,
- said lens solution consisting essentially of a cationic cellulosic polymer in water solution with said polymer being present in an amount of from 0.001 to 10% by weight of said solution,
- said solution being sterile and having a physiologically acceptable pH in the range of 6 to 8.
Dependencies are inferred from the claim text.