Lindstrom R L
Phillips Eye Institute Center for Teaching and Research, Minneapolis, Minnesota, USA.
J Cataract Refract Surg. 1995 Jan;21(1):27-34. doi: 10.1016/s0886-3350(13)80475-0.
Radial keratotomy (RK) is a common surgical technique for correcting myopia. The RK incisions, like any corneal incisions, permanently weaken the cornea and this structural weakening can cause several complications and side effects, including diurnal fluctuation, progressive hyperopic shift, and the potential for traumatic rupture of the keratotomy scars. I describe a new technique--minimally invasive RK (mini-RK)--that reduces the millimeters of cornea incised and present preliminary laboratory and clinical results. In a cadaver eye study, eight short, deep incisions extending from the 3.0 mm optical zone to the 7.0 mm optical zone produced 92% of the efficacy of full-length incisions to the 11.0 mm optical zone. This finding was confirmed by intraoperative surgical keratometry in six patients in whom a 1% increase in central corneal flattening was achieved when incisions were extended from the mini-RK configurations to full length. In a retrospective evaluation of 100 patients with -1.0 to -6.0 diopters (D) of myopia, 92% of eyes were within 1.0 D of emmetropia and 94% had 20/40 or better uncorrected visual acuity. No significant complications were encountered. Mini-RK may be a useful alternative to reduce the invasiveness of RK but retain its efficacy in eyes with low to moderate myopia.
放射状角膜切开术（RK）是一种矫正近视的常见手术技术。与任何角膜切口一样，RK切口会永久性地削弱角膜，这种结构上的削弱会导致多种并发症和副作用，包括日间视力波动、渐进性远视偏移以及角膜切开术瘢痕外伤性破裂的可能性。我描述了一种新技术——微创RK（mini-RK），它减少了角膜切开的长度，并展示了初步的实验室和临床结果。在一项尸体眼研究中，从3.0毫米光学区延伸至7.0毫米光学区的8个短而深的切口产生了全长切口至11.0毫米光学区92%的效果。这一发现通过对6例患者术中手术角膜曲率测量得到证实，当切口从mini-RK构型延长至全长时，中央角膜平坦度增加了1%。在对100例近视度数为-1.0至-6.0屈光度（D）的患者进行的回顾性评估中，92%的眼睛屈光不正度数在正视眼的1.0 D以内，94%的患者裸眼视力达到20/40或更好。未遇到明显并发症。Mini-RK可能是一种有用的替代方法，可降低RK的侵入性，但在中低度近视眼中保留其疗效。
