Introduction to scleral lenses Sept. 09, 2015 Overview Show transcript Overview Muriel M. Schornack, O.D., Ophthalmology, provides an introduction to scleral lenses: Large-diameter, rigid, gas-permeable contact lenses that rest on the sclera and trap a layer of fluid between the back of the lens and the front of the cornea. Scleral lenses provide unique fitting and optical characteristics. Receive Mayo Clinic news in your inbox. Sign up Related ContentArticleSCOPE research tracks increased use, performance of scleral lenses VID-20433347 Medical Professionals Introduction to Scleral Lenses