A microkeratome for performing Lasik surgery

摘要

The microkeratome comprises a holder (10) with a suction ring (11) for attachment to the sclera (12) of a patient's eye (13). A suction source (20) is connected to the ring (11). A slide (30) is displaceably mounted on the holder (10) in a linear guide (22). The slide (30) has a plane frontal surface (31) including a transparent plate (32) for contacting the cornea (70) of the eye (13). The plate (32) has concentric circular marks (34) for centering on the eye (13) and for reading the diameter (D) of contact in an initial position of the slide (30). The slide (30) contains a cutting blade (51) with a cutting edge (52) that is parallel to surface (31) and oscillatable in the direction of the edge (52). Two motors (35, 57) are mounted on the slide (30) for moving the slide (30) and oscillating the blade (51). A control unit (21) is connected to the motors (35, 57) and has input means (64) for entering the measured diameter (D), the desired width (H) of the remaining hinge (68) of the flap (69) of tissue to be cut, the speed of advance of the slide (30) and the oscillating frequency of the blade (51) can be entered. The microkeratome is versatile and allows an optimization of the parameters of operation.