| 摘要 |
A method of reshaping a cornea to meet the refractive needs of a patient is provided which includes: providing apparatus suitable for conducting keratomileusis in situ, the apparatus including a keratome means to cut across and remove a section of the cornea, and positioning means to maintain shaping means in register with respect to the cornea, the shaping means having a lower surface which can be brought into contact with the cornea, and engaged to downwardly depress the exposed surface of the cornea into a substantially flat configuration across a predefined optical zone; engaging the lower surface with the surface of the cornea, depressing the cornea and then causing the keratome to move across the cornea removing a predetermined section of the cornea thereby creating a revised exposed surface; retaining the section for later reattachment; providing a lenticular member having a predetermined thickness profile, and disposing the lenticular member between the lower surface and the revised surface of the cornea; engaging the lower surface to move downwardly depressing the lenticular member and thereby the revised surface of the cornea whereby the surface of the cornea is altered to a predetermined configuration converse to the configuration of the lenticular member, causing the keratome to move across the cornea a second time, removing a second predetermined section of the cornea; and, reattaching the first removed section. |
