Abstract: A self-adhering contact lens made of flexible material for adhering to cornea and scleral regions of the eye includes a central lens portion optically shaped for viewing interior regions of the eye. The central lens portion has an interior concave surface with a radius of curvature R1 for contacting the cornea. An outer flange formed integrally with the central lens portion extends radially outwardly from the central lens portion. The outer flange has an interior concave surface extending from the interior concave surface of the central lens portion. The interior concave surface of the outer flange is designed to contact the sclera and has a radius of curvature R2 that is greater than the radius R1. The outer flange is shaped for deflecting relative to the central lens portion for conforming the interior concave surface of the outer flange to the sclera.

Abstract: A self-adhering contact lens made of flexible material for adhering to cornea and scleral regions of the eye includes a central lens portion optically shaped for viewing interior regions of the eye. The central lens portion has an interior concave surface with a radius of curvature R.sub.1 for contacting the cornea. An outer flange formed integrally with the central lens portion extends radially outwardly from the central lens portion. The outer flange has an interior concave surface extending from the interior concave surface of the central lens portion. The interior concave surface of the outer flange is designed to contact the sclera and has a radius of curvature R.sub.2 that is greater than the radius R.sub.1 of. The outer flange is shaped for deflecting relative to the central lens portion for conforming the interior concave surface of the outer flange to the sclera.

Abstract: A surgical instrument provides improved precision and performance for use in highly intricate surgeries such as vitrectomy which frequently involves removing dense vitreous base firmly adherent to the retinal surface. The instrument includes two concentric tubes, an outer tube having ports near the closed end, and a slidable inner tube which fits snugly inside the outer tube. The inner tube includes a sharp cutting edge formed on one end that slides back and forth across the ports to cut vitreous, and an axial passage to pass the cut portions of vitreous. Such a surgical instrument maintains highly effective and accurate cutting member for removing vitreous without cutting into the retina.

Abstract: A surgical instrument provides improved precision and performance for use in highly intricate surgeries such as vitrectomy which frequently involves removing dense vitreous base firmly adherent to the retinal surface. The instrument includes two concentric tubes, an outer tube having ports near the closed end, and a slidable inner tube which fits snugly inside the outer tube. The inner tube includes a sharp cutting edge formed on one end that slides back and forth across the ports to cut vitreous, and an axial passage to pass the cut portions of vitreous. Such a surgical instrument maintains highly effective and accurate cutting device for removing vitreous without cutting into the retina.