Walkow T, Anders N, Wollensak J
Augenklinik im Virchow-Klinikum, Medizinische Fakultät, Humboldt-Universität zu Berlin.
Klin Monbl Augenheilkd. 1996 Oct;209(4):199-204. doi: 10.1055/s-2008-1035302.
Phototherapeutic keratectomy with the excimer laser is a suitable procedure for corneal smoothing after pterygium excision. In this study the effect of postoperative excimer laser smoothing on induced and absolute astigmatism after pterygium surgery was investigated.
60 of 53 eyes underwent pterygium surgery using a bare sclera technique. In addition 30 of the treated eyes underwent postoperative phototherapeutic keratectomy of the wound region with the excimer laser. Astigmatism was measured preoperatively and postoperatively after 6 months up to four years.
Absolute astigmatism of patients treated with excimer laser decreased significantly from 1.38 +/- 0.83 D preoperative to 0.35 +/- 0.32 D postoperative (p < 0.0001). In this group mean induced astigmatism was 1.37 +/- 0.93 D. There was no correlation between the induced astigmatism and the number of excimer pulses applied (r = 0.0287; p = 0.905). Absolute astigmatism of the control group decreased from 1.10 +/- 0.85 D to 0.72 +/- 0.56 D (p < 0.05). There were no significant differences between the excimer- and the control group concerning preoperative astigmatism. Postoperative absolute astigmatism of the excimer group was significantly lower than absolute astigmatism of the control group (p < 0.0001). Mean induced astigmatism of the control group was 1.15 +/- 0.95 D and not significantly different from the excimer treated group (p = 0.2654).
Phototherapeutic keratectomy with an excimer laser for corneal smoothing after pterygium excision reduces astigmatism significantly.
准分子激光光治疗性角膜切削术是翼状胬肉切除术后角膜平整的合适手术方法。本研究探讨了术后准分子激光平整对翼状胬肉手术后诱导性散光和绝对散光的影响。
53只眼中的60只眼采用裸巩膜技术进行翼状胬肉手术。此外，30只接受治疗的眼睛术后用准分子激光对伤口区域进行光治疗性角膜切削术。术前及术后6个月至4年测量散光情况。
接受准分子激光治疗的患者绝对散光术前为1.38±0.83D，术后显著降至0.35±0.32D（p<0.0001）。该组平均诱导性散光为1.37±0.93D。诱导性散光与准分子激光脉冲数之间无相关性（r=0.0287；p=0.905）。对照组绝对散光从1.10±0.85D降至0.72±0.56D（p<0.05）。准分子激光组与对照组术前散光无显著差异。准分子激光组术后绝对散光显著低于对照组（p<0.0001）。对照组平均诱导性散光为1.15±0.95D，与准分子激光治疗组无显著差异（p=0.2654）。
翼状胬肉切除术后用准分子激光进行光治疗性角膜切削术可显著降低散光。
