| 摘要 |
A method of performing a LASIK procedure. The method includes providing LASIK instrumentation, preferably including an automated microkeratome instrument and an excimer laser. The microkeratome device includes both a microkeratome as well as a suction ring. A high-pressure range tonometer instrument is also provided. The tonometer includes a probe for sensing a parameter of the eye indicative of intraocular pressure, and is capable of providing intraocular pressure measurements in excess of 80mm Hg; more preferably in excess of 100 mm Hg; most preferably up to or in excess of 120 mm Hg. The suction ring is positioned over the patient's eye, and a vacuum applied. The high-pressure range tonometer probe is positioned relative to the eye so as to sense a parameter indicative of intraocular pressure. The measured intraocular pressure is then provided to the surgeon. Based upon the measured intraocular pressure, the surgeon determines whether the corneal site is properly prepared for optimal microkeratome incision. For example, the surgeon determines whether the measured intraocular pressure meets or exceeds a minimum value. In one preferred embodiment, the intraocular pressure must be equal to or exceed 100 mm Hg, although other minimum values, such as 110 mm Hg, 120 mm Hg, etc. are equally acceptable. One sufficient intraocular pressure has been established, the LASIK procedure proceeds in accordance with accepted protocol. For example, the microkeratome is employed to cut a flap in the cornea which is then folded back. The excimer laser ablates the exposed portion of the cornea to effectuate the desired vision correction. Finally, the flap is replaced and the surgery is complete. |
