Wettable, Flexible, Oxygen Permeable Contact Lens Containing Block Copolymer Polysiloxane-Polyoxyalkylene Backbone Units, and Use thereof

摘要

This invention relates to ophthalmic devices, such as contact lenses and intraocular implants, and particularly contact lenses of a block copolymer containing polysiloxane and polyoxyalkylene oxide units possessing an advantageous blend of desirable properties including a) high oxygen permeability, b) good wettability, c) flexibility and d) optical clarity, in the ocular environment of use. Even the preparation thereof and methods of treating vision defects therewith are disclosed, as well as the polymers which may be used for said ophthalmic devices.