Patent ID: 6569153
Filing Date: 2003-05-27
Classification: A61B,A61F

Abstract:
A surgical instrument, for placement around the limbus of the eye during corneal surgery by laser, comprising:a. a lower ring having a vertical axis, an upper surface and lower surface spaced axially apart and defining a thickness therebetween, and an outer diameter and inner diameter spaced radially apart and defining an annularwall therebetween, all together defining a disc shaped structure having a central aperture surrounded by an annular wall; b. wherein the inner diameter of said lower ring is sized to fit closely about the circumference of the limbus of the eye; c. wherein said lower ring includes a platform superposed on a section of said upper surface and extending a height thereabove; d. an upper ring, spaced vertically above said lower ring when said lower ring is positioned on the surface of the eye around the limbus thereof, said upper ring having an internal gas transmissible passage-way, a plurality of gas transmissible ports extending between the exterior surface of said upper ring and said gas transmissible passage-way and a gas transmissible port extending between said gas transmissible passage-way and an external vacuum source; and, e. an intermediate ring, spaced between said lower ring and said upper ring, said intermediate ring having an internal liquid transmissible passage-way, a plurality of liquid transmissible ports extending between the exterior surface of said intermediate ring and said liquid transmissible passage-way and a liquid transmissible port extending between said liquid transmissible passage-way and an external liquid source.