| 摘要 |
PURPOSE: To correct the nearsightedness, far-sightedness, or astigmatism generated based on the curvature of a cornea by grinding and/or lapping the visual sense curvature region of the cornea. CONSTITUTION: A grinder 50 is inserted into the recess 21 of a base member 20, a grinding or lapping punch 35 is driven at the corresponding speed, and parameters for the method grinding or lapping the cornea surface measured with the curvature, correction value, and grinding depth are applied to the punch 35. A micrometer screw 60 surely gives an accurate feed motion to a stop point of the limited height to the grinding or lapping punch 35. The first relatively thin cornea epithelium layer including the Bowman's membrane and a part of cornea stroma is removed in consideration of the measured parameters during the grinding or lapping action, however the exposed cornea stroma is again formed by epithelium cells after a certain period elapses. |
