Patent ID: 8147897

Claim:
A method for making a contact lens comprising a core material and a coating thereon, the method comprising the steps of: (a) providing the core material; (b) applying one or more layers of a crosslinkable polycationic material, wherein the polycationic material is a reaction product of: (i) an epoxide of formula (I) wherein X equals bromo, chloro, iodo, or cyano, and R 1 , R 2 , R 3 , R 4 , independently of one another, are selected from the group consisting of hydrogen, linear or branched C 1 -C 6 -alkyl, and linear or branched C 1 -C 6 -alkyl which is substituted with halogen, and (ii) a polymer having repeating units comprising one or more secondary or tertiary amine group(s); (c) applying one or more layers of a polyanionic material; and (d) cross-linking the layers of polyelectrolytes formed by steps (b) and (c).