Patent ID: 8689971

Claim:
An ophthalmic product, comprising a sealed and sterilized package which include a packaging solution and a soft hydrogel contact lens immersed in the packaging solution, wherein the packaging solution includes: a copolymer of vinylpyrrolidone and at least one amino-containing vinylic monomer, wherein the amino-containing vinylic monomer is selected from the group consisting of alkylaminoalkylmethacrylate having 8-15 carbon atoms, alkylaminoalkylacrylate having 7-15 carbon atoms, dialkylaminoalkylmethacrylate having 8-20 carbon atoms, dialkylaminoalkylacrylate having 7-20 carbon atoms, and N-vinylalkylamide having 3-10 carbon atoms, wherein the copolymer of vinylpyrrolidone is present in an amount sufficient to provide the packaging solution a viscosity of up to about 5.0 centipoises at 25° C., wherein the copolymer of vinylpyrrolidone has a molecular weight sufficiently large to form a cushion layer on the soft hydrogel contact lens; a polyethylene glycol having an average molecular weight of about 600 or less; an α-oxo-multi-acid or salt thereof in an amount sufficient to have a reduced susceptibility to oxidation degradation of the polyethylene glycol in the packaging solution; and one or more buffering agents in an amount sufficient to provide the solution a pH of from about 6.0 to 8.0, wherein the packaging solution has an osmolality of from about 200 to about 450 mOsm/kg.