Patent ID: 7165839

Claim:
A method for producing full-body tinted contact lenses, the method comprising the steps of: (a) preconditioning particles of a pigments, wherein the step of preconditioning comprises applying a coating of one or more polyionic materials onto the surfaces of pigments particles by contacting the pigment particles with a solution of the one or more polyionic materials, removing the solution with pigment particles by filtration; optionally washing the filtered pigment particles with the coating of the one or more polyionic materials thereon, and optionally drying the filtered pigment particles with the coating of the one or more polyionic materials thereon; (b) dispersing the preconditioned pigment particles in a polymerizable fluid composition to obtain a pigment-containing polymerizable dispersion; (c) introducing an amount of the pigment-containing polymerizable dispersion in a mold for making a contact lens; and (d) polymerizing the polymerizable dispersion in the mold to form a full-body tinted contact lens with the particles of the pigment entrapped and distributed therein.