Patent ID: 7329415

Claim:
A contact lens, comprising: a hydrogel bulk material, and a coating having at least one layer of a vesicle having surface charges and one layer of a polyionic material having charges opposite the charges of the vesicle, wherein said vesicle is selected from the group consisting of a polymerized liposome, a polymerized micelle, a nanocapsule having a multilayered shell of polyelectrolytes, a microcapsule having a multilayered shell of polyelectrolytes, and combinations thereof, said vesicle encapsulates a guest material selected from the group consisting of a biosensor, a drug, a protein, an amino acid, a nucleic acid, a polypeptide, metallic nanoparticles, magnetic nanoparticles, optically active nanoparticles, and dyes, wherein a first layer in contact directly with the surface of said bulk material is said layer of the polyionic material, or said layer of the vesicle.