| abstract |
The present invention provides a medical device, preferably an ophthalmic device, more preferably a contact lens, which comprises a lubricious coating including a capping layer of polyvinylpyrrolidone and/or at least one layer of a lubricious coating material and one layer of a polyionic material having charges opposite of the charges of the lubricious coating material. The lubricious coating on the medical device of the invention has increased lubricity, preferably characterized by an averaged CoF of about 3.0 or less, increased hydrophilicity characterized by an averaged contact angle of about 80 degree or less, and increased bacterial adhesion resistance, while maintaining the desired bulk properties such as oxygen permeability and ion permeability of lens material. Such lenses are useful as extended-wear contact lenses. In addition, the invention provides provides a method for making a medical device, preferably a contact lens, having a lubricious coating thereon. |