| 摘要 |
PROBLEM TO BE SOLVED: To easily correct short-sighted and far-sighted astigmatism with simple configuration by providing an aperture for limiting the area to be irradiated with laser beams, beam direction adjusting means, beam displacing means and aberration quantity control means. SOLUTION: The laser beam horizontally emitted from a laser light source 1 is deflected upward by 90 deg. by a planar mirror 2 and horizontally deflected again by a planar mirror 3. The planar mirror 3 can be vertically moved by a mirror driving device 4, the laser beam emitted from the laser light source 1 is parallelly moved in the direction of Gaussian distribution, and the laser beam is displaced from the optical axis L of an optical light transmission system. The opening diameter of a variable circular aperture 7 for limiting an aberration range can be changed by an aperture driving device 8, and a projection lens 9 for projecting the aperture 7 on the cornea 12 of the eye of a patient is moved in the direction of the optical axis by a lens driving device 10 and changes the size of the projected image of the aperture 7. |
