Contact lenses having cationic monomers or cationic polymers for releasing comfort agents
AssigneeBausch + Lomb Ireland Limited
InventorAlok Kumar Awasthi
Life of this patent
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Abstract
A packaging system for the storage of a contact lens comprising a sealed container containing an unused contact lens including one or more anionic comfort agents associated with a cationic monomer or a cationic polymer immersed in an aqueous packaging solution, wherein the aqueous packaging solution has an osmolality of at least about 200 mOsm/kg, a pH of about 6 to about 9 and is sterilized.
Claims20
A packaging system for the storage of a contact lens comprising a sealed container containing an unused contact lens comprising one or more anionic comfort agents associated with a cationic monomer or a cationic polymer immersed in an aqueous packaging solution, wherein the aqueous packaging solution has an osmolality of at least about 200 mOsm/kg, a pH of about 6 to about 9 and is sterilized.
A method of preparing a package comprising a storable, sterile contact lens, the method comprising:
- (a) immersing an unused contact lens which is a polymerization product of a contact lens-forming monomeric mixture comprising (i) one or more contact lens-forming monomers, and (ii) one of one or more anioinic comfort agents or one of a cationic monomer, a cationic polymer, a cationic-forming monomer or a cationic-forming polymer in an aqueous packaging solution comprising the other one of the one or more anioinic comfort agents or the one of a cationic monomer, a cationic polymer, a cationic-forming monomer or a cationic-forming polymer, wherein the aqueous packaging solution has an osmolality of at least about 200 mOsm/kg and a pH in the range of about 6 to about 9;
- (b) packaging the aqueous packaging solution and the unused contact lens in a manner preventing contamination of the contact lens by microorganisms;
- and
- (c) sterilizing the packaged aqueous solution and the unused contact lens.
Dependencies are inferred from the claim text.