Abstract: A trephine device for at least partially removing a section of the anterior epithelial cells from a corneal surface, typically prior to laser excimer reshaping of a portion of the corneal surface, comprises a housing having upper and lower end portions, removal apparatus integral to the housing, and apparatus for activating and deactivating the removal apparatus. The removal apparatus may have at least one cutting surface adapted to conform substantially to the shape of the cornea, with the cutting surface contacted with the cornea at a pressure sufficient to remove the anterior epithelial cells without affecting underlying corneal tissue.

Abstract: A trephine device for removing anterior epithelial cells from a corneal surface, typically prior to laser excimer reshaping of a portion of the corneal surface, comprises a housing having upper and lower end portions, removal means integral to the housing, and means for activating and deactivating the removal means. The removal means may have at least one cutting surface adapted to conform substantially to the shape of the cornea, with the cutting surface contacted with the cornea at a pressure sufficient to remove the anterior epithelial cells without affecting underlying corneal tissue.

Abstract: A posterior chamber lens implant has a lens and a pair of haptics or holding loops. Each loop has an elongated flange projecting from the lens and extending approximately one-quarter of the way around the lens periphery. A free loop portion projects from the flange and curves around the lens so as to overlap the flange of the other loop. Accordingly, the flanges are positioned, relative to the loops, so as to be substantially axially oriented during implantation and so that one flange acts as an insertion guide for the lens body. When implanted, the loops encircle the lens so as to center the lens and protect the lens against secondary fiber growth.

Abstract: A lens implant for insertion in the posterior chamber of human eye following an extra-capsular removal of the natural lens of the eye comprises a lens 1 of polymethyl methacrylate with two similar integral holding loops 2, which are flexible and resilient. Each loop 2 has a relatively stiff radial portion 3 followed by more flexible portions 5, 6 and 7 of varying curvatures. The free end 8 of each loop lies radially outwardly from the portion 5 of the other loop and the loops are so shaped that when the ends 8 are squeezed inwards into contact with the portions 5, the two loops 2 together form a substantially circular ring surrounding the lens concentrically. This facilitates insertion of the lens through an incision into the eye and, after insertion, the loops spring outwards again and engage either the anterior capsular flaps remaining after removal of the natural lens or the ciliary sulcus to hold the lens in position in the eye.

Abstract: A lens implant for insertion in the posterior chamber of human eye following an extra-capsular removal of the natural lens of the eye comprises a lens 1 of polymethyl methacrylate with two similar integral holding loops 2, which are flexible and resilient. Each loop 2 has a relatively stiff radial portion 3 followed by more flexible portions 5, 6 and 7 of varying curvatures. The free end 8 of each loop lies radially outwardly from the portion 5 of the other loop and the loops are so shaped that when the ends 8 are squeezed inwards into contact with the portion 5, the two loops 2 together form a substantially circular ring surrounding the lens concentrically. This facilitates insertion of the lens through an incision into the eye and, after insertion, the loops spring outwards again and engage either the anterior capsular flaps remaining after removal of the natural lens or the ciliary sulcus to hold the lens in position in the eye.