Abstract: A keratome includes a cutting instrument having a cutter head with a reciprocating blade and a cutting edge extending below a sole surface of the cutter head, an automated drive unit mounting the cutting instrument for powered translational movement of at least the cutter head thereof, and a suction ring including an eye ring adapted to be secured to an eye by suction and defining a cornea aperture for presenting the outer layer of the cornea of the eye for cutting.

Abstract: A light beam intensifier (10) having a paraboloidal reflector (12) a mirror (14) a single light tube (16) and window (18). The mirror (14) is placed forward of the forcal point f of the reflector (12) and has the light tube (16) affixed thereto to be positioned coincident with the focal point f. As the light tube (16) is energized, light rays (52) emanating directly therefrom are reflected from the parabolic reflector (12) to form a first beam path and the forward shining light rays (54) are reflected from the reflective surface (34) of the mirror (14) to be reflected off the paraboloidal reflector (12) to form a composite light beam path (56) having a predetermined pattern.