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采用ＴＭＳ２型角膜地形图仪对孔源性视网膜脱离患者１５例１５只眼。于巩膜环扎术前、术后１周及术后１个月进行角膜屈光力测量分析。同时测量手术前后眼轴及屈光度的改变。结果：①环扎术后１周角膜屈光力、散光值较术前稍增加，无统计学意义。而术后１个月角膜屈光力、散光值与术前检查基本相同。②环扎术后眼轴明显延长，近视度亦增大。随着时间推移，眼轴逐渐缩短，近视度减小。术后１月眼轴长度及近视度较术前明显增加。巩膜环扎术后眼轴长度的变化是导致眼屈光度变化的主要因素。
Fifteen patients (15 eyes) with rhegmatogenous retinal detachment were treated with TMS2 corneal topography. Corneal refractive power measurement before scleral cerclage surgery, 1 week after surgery and 1 month after surgery. Simultaneous measurement of changes in ocular axial and refractive power before and after surgery. Results: ① The corneal refractive power and astigmatism slightly increased one week after cerclage, showing no statistical significance. And 1 month after corneal refractive power, astigmatism and preoperative examination basically the same. ② cerclage axial length was significantly longer, myopia also increased. As time goes by, the ocular axis gradually shortens, myopia decreases. The axial length and the degree of myopia in January after operation were significantly higher than those before operation. Changes in ocular length after scleral cerclage are the major contributors to eye refractive changes.