el Danasoury M A, Waring G O, el Maghraby A, Mehrez K
El Maghraby Eye and Ear Center, Abu Dhabi, United Arab Emirates.
J Refract Surg. 1997 Sep-Oct;13(6):511-20. doi: 10.3928/1081-597X-19970901-07.
We studied the efficacy, predictability, stability, and safety of excimer laser in situ keratomileusis (LASIK) to correct myopia and astigmatism.
We prospectively studied 87 consecutive eyes of 56 patients who received LASIK, divided into two groups: the myopic group included eyes with myopia more than -2.00 diopters (D) and astigmatism less than 0.50 D and the astigmatism group included eyes with myopia of more than -2.00 D and astigmatism of 0.50 D or more. The Chiron automated corneal shaper and the Nidek EC-5000 excimer laser were used in all eyes. A modified personal nomogram was used in all eyes. The changes in refractive sphere and cylinder, and complications were studied at 2 and 6 weeks, 3, 6, and 12 months after surgery. Preoperatively, the mean spherical equivalent refraction was -4.41 D (range, -2.25 to -7.25; SD, 1.74) in the myopia group and -5.79 D (range, -2.25 to -15.50 D; SD, 2.45) in the astigmatism group. The mean spherical component of the refraction was -4.39 D (range, -2.25 to -7.25; SD, 1.74) in the myopia group and -5.19 D (range, -2.00 to -14.00; SD, 2.32) in the astigmatism group. The mean refractive cylinder was 1.19 D (range, 0.5 to 3.00 D; SD, 0.62) in the astigmatism group.
At 12 months, 81 eyes (93.6%) of 51 patients were examined; the mean spherical equivalent refraction was -0.43 D (range, +0.50 to -1.25 D; SD, 0.35) in the myopia group and -0.33 D (range, +1.25 to -2.13 D; SD, 0.52) in the astigmatism group. The mean spherical component of the refraction at 12 months was -0.33 D (range, +0.50 to -1.25 D; SD, 0.33) in the myopia group and -0.17 D (range, +1.50 to -1.50; SD, 0.48) in the astigmatism group. The mean refractive cylinder was 0.19 D (range, 0 to 0.75 D; SD, 0.25) in the myopia group and 0.32 D (range, 0 to 1.25 D; SD, 0.30) in the astigmatism group. The mean change in spherical equivalent refraction between 6 weeks and 12 months after surgery was -0.08 D toward myopia (range, -0.50 to -0.75 D; SD, 0.23) in both groups. No eyes lost two or more lines of spectacle-corrected visual acuity. Patient satisfaction was high in both groups. Complications included undercorrection that necessitated reoperation (three eyes), overcorrection (two eyes), and small disc diameter (one eye). No vision threatening complications were observed.
LASIK with the Nidek EC5000 laser is effective, reasonably predictable, stable, and safe for correction of compound myopic astigmatism with a spherical component between -2.00 and -14.00 D, and a cylindrical component between 0.50 and 3.00 D using the techniques in this study. Astigmatism is undercorrected with the current algorithm. Correction of higher amounts of astigmatism requires further study.
我们研究了准分子激光原位角膜磨镶术（LASIK）矫正近视和散光的疗效、可预测性、稳定性及安全性。
我们对56例患者的87只眼进行了前瞻性研究，这些患者接受了LASIK手术，分为两组：近视组包括近视度数超过-2.00屈光度（D）且散光度数小于0.50 D的眼睛，散光组包括近视度数超过-2.00 D且散光度数为0.50 D或更高的眼睛。所有眼睛均使用Chiron自动角膜板层刀和Nidek EC-5000准分子激光。所有眼睛均使用改良的个人列线图。在术后2周和6周、3个月、6个月及12个月时研究屈光球镜和柱镜的变化以及并发症情况。术前，近视组平均等效球镜度为-4.41 D（范围为-2.25至-7.25；标准差为1.74），散光组为-5.79 D（范围为-2.25至-15.50 D；标准差为2.45）。近视组平均屈光球镜成分为-4.39 D（范围为-2.25至-7.25；标准差为1.74），散光组为-5.19 D（范围为-2.00至-14.00；标准差为2.32）。散光组平均屈光柱镜为1.19 D（范围为0.5至3.00 D；标准差为0.62）。
在12个月时，对51例患者的81只眼进行了检查；近视组平均等效球镜度为-0.43 D（范围为+0.50至-1.25 D；标准差为0.35），散光组为-0.
