Patent ID: 8647658

Claim:
An ophthalmic product, comprising: a sealed and sterilized package which includes a relative-viscous packaging solution having a viscosity of from about 2.0 centipoise to about 8 centipoise at 25° C. and a soft hydrogel contact lens immersed in the relative-viscous packaging solution, wherein the hydrogel contact lens comprises a polymer matrix, a first leachable polymeric lubricant, and a second leachable polymeric lubricant, wherein the second leachable polymeric lubricant has an average molecular weight being at least about 3 fold of the average molecular weight of the first leachable polymeric lubricant, wherein the relative-viscous packaging solution includes (1) from about 0.1% to about 1% by weight of a hydroxyl-containing viscosity-enhancing polymer selected from the group consisting of hydroxymethylcellulose, hydroxyethyl cellulose, hydroxypropylcellulose, hydroxypropylmethyl cellulose, and a mixture thereof, (2) a polyethylene glycol having a molecular weight of 2000 or less, (3) 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 relative-viscous packaging solution, and (4) one or more buffering agents in an amount sufficient to provide the solution a pH of from about 6.0 to 8.0, and wherein the packaging solution has an osmolality of from about 200 to about 450 mOsm/kg, wherein the soft hydrogel contact lens is characterized by its capability of easing lens-wearer's initial discomfort and providing a wearer with a comfort for a prolonged time period of more than six hours.