Clinical Performance of Extended Wear Silicone Hydrogel Lenses

Inclusion Criteria: * Is correctable to at least 6/9 distance visual acuity in each eye with spherical contact lenses. * Is a current daily wear soft contact lens wearer. * Has no clinically significant anterior eye findings. * Has no other active ocular disease. Exclusion Criteria: * Has any systemic disease that might interfere with contact lens wear * Is using any systemic or topical medications that will affect ocular health. * Has any pre-existing ocular irritation that would preclude contact lens fitting. * Has any ocular pathology or severe insufficiency of lacrimal secretion (dry eyes) that would affect the wearing of contact lenses. * Has undergone corneal refractive surgery. * Is pregnant, lactating or planning a pregnancy.