Ismail Mahmoud M
University of Al-Azhar, El Magrabi Eye Hospital, Cairo, Egypt.
J Refract Surg. 2006 Nov;22(9 Suppl):S1069-72. doi: 10.3928/1081-597X-20061102-11.
To assess the refractive outcomes of LASIK for the surgical correction of hyperopic astigmatism using the NIDEK EC-5000 excimer laser.
LASIK was performed on 46 eyes from 26 patients (19 men and 7 women) for the correction of congenital hyperopic astigmatism. The NIDEK EC-5000 excimer laser and the Moria M2 microkeratome were used in all procedures. Cylindrical ablations were performed on the negative axis out to a 6-mm diameter.
The mean preoperative cylindrical refraction was +3.15+/-0.70 diopters (D) (range: +1.75 to +4.50 D), and the mean 24-month postoperative refraction was +1.27+/-0.78 D (range: +0.50 to +3.25 D). Vector analysis showed a 2.17+/-1.27 D reduction in the equivalent cylinder. Preoperative mean uncorrected visual acuity (UCVA) was 20/100, and 24-month postoperative UCVA was 20/30. One eye lost one line of best spectacle-corrected visual acuity at 24 months postoperatively. Complications related to the LASIK flap occurred in 2 (4.3%) eyes. Partial regression of the astigmatic effect began at 4 to 6 months but stabilized by 1 year.
LASIK is a safe but limited alternative for the correction of astigmatism in eyes with hyperopic astigmatism. Early regression of the astigmatic effect in the first 6 months seems to be the primary disadvantage of this technique.
评估使用NIDEK EC - 5000准分子激光行准分子原位角膜磨镶术（LASIK）手术矫正远视散光的屈光效果。
对26例患者（19例男性，7例女性）的46只眼行LASIK手术矫正先天性远视散光。所有手术均使用NIDEK EC - 5000准分子激光和Moria M2微型角膜刀。在负轴上进行直径达6毫米的柱面消融。
术前平均柱镜屈光度为+3.15±0.70屈光度（D）（范围：+1.75至+4.50 D），术后24个月平均屈光度为+1.27±0.78 D（范围：+0.50至+3.25 D）。矢量分析显示等效柱镜减少2.17±1.27 D。术前平均未矫正视力（UCVA）为20/100，术后24个月UCVA为20/30。1只眼在术后24个月最佳矫正视力下降了一行。与LASIK角膜瓣相关的并发症发生在2只眼（4.3%）。散光效应的部分消退在4至6个月开始，但在1年时稳定。
LASIK是矫正远视散光眼中散光的一种安全但有局限性的方法。术后前6个月散光效应的早期消退似乎是该技术的主要缺点。
