Hassan Z, Lampé Z, Békési L, Berta A
Department of Ophthalmology, University Medical School of Debrecen, Hungary.
Acta Chir Hung. 1997;36(1-4):122-4.
In this study we would like to introduce the excimer laser, and to demonstrate our results and complications by using different ablation zones during photorefractive keratectomy (PRK) in the correction of myopia and astigmatismus. In 1996 we performed photorefractive keratectomy on 100 myopic eyes of 52 patients (28 females, 24 males). Mean age was 26.21 years (ranged from 19 to 54 years). The preoperative refraction ranged from -1.0 D to -18.0 Diopters. The diameter of the ablation zones were between 5 and 6.5 mm. We evaluated the results and the complications of the surgeries of 100 eyes which were performed with Schwind keratom F excimer laser. After 2 days, 1 week, 1 month, 3 months, and 6 months postoperatively we tested the best uncorrected and corrected visual acuities, and performed intraocular pressure measurement, slit lamp examination as well as corneal topography. The postoperative refractions were between +/- 0.5 to +/- 1.0 Diopters. After six months postoperatively the slit lamp examination showed that 80% of the patients had no corneal haze while 20% had stage I (Hanna) corneal haze. The smaller the diameter of the ablation zone was, the more pronounced the corneal haze and the night-glare were. The photorefractive excimer laser keratectomy is judged to be a safe method, although it might have some side-effects. The different ablation zones of this treatment means an important modification, that not only allows the method to meet the individual requirements, but reduces the chance of the complications as well. Based on the authors' experiences PRK for moderate myopia with large diameter ablation zones appears more predictable than than with smaller ablation zone diameters.
在本研究中，我们将介绍准分子激光，并通过在准分子激光原位角膜磨镶术（PRK）治疗近视和散光时使用不同的消融区来展示我们的结果及并发症情况。1996年，我们对52例患者（28例女性，24例男性）的100只近视眼睛进行了准分子激光原位角膜磨镶术。平均年龄为26.21岁（范围为19至54岁）。术前屈光度范围为-1.0 D至-18.0屈光度。消融区直径在5至6.5毫米之间。我们评估了使用Schwind keratom F准分子激光进行手术的100只眼睛的手术结果及并发症。术后2天、1周、1个月、3个月和6个月，我们检测了最佳矫正视力和未矫正视力，并进行了眼压测量、裂隙灯检查以及角膜地形图检查。术后屈光度在±0.5至±1.0屈光度之间。术后6个月，裂隙灯检查显示80%的患者没有角膜 haze，而20%有I期（汉纳）角膜 haze。消融区直径越小，角膜 haze和夜间眩光越明显。尽管准分子激光原位角膜磨镶术可能有一些副作用，但它被认为是一种安全的方法。这种治疗的不同消融区意味着一项重要的改进，不仅使该方法能够满足个体需求，还减少了并发症的发生几率。根据作者的经验，对于中度近视，大直径消融区的PRK似乎比小直径消融区的更可预测。
