Patent ID: 8899745

Claim:
A method for making an ophthalmic lens comprising: contacting the lens with a solution comprising a functional compound in an alcohol, a ketone, an ether, an aldehyde, or any combination thereof, wherein the functional compound comprises at least one group capable of forming a covalent bond with the lens upon exposing the lens to irradiation and/or heat, wherein the lens comprises a silicon hydrogel; and irradiating and/or heating the lens produced in step (a) to covalently attach the functional compound to the lens, wherein the lens subjected to step a) and step b) treatment has an UVB absorbing capability characterized by having an UVB transmittance being at least 50 percentage lower than that of the lens subjected to only step a) treatment when both lenses are extracted with methyl ethyl ketone for about 20 hours.