显微角膜板层切除术后角膜地形图和屈光变化的关系

Corneal topography change and clinical refraction after microlamellar keratectomy

为探讨显微板层角膜切除术后角膜地形图和临床屈光变化的关系，对近视屈光度－7．00D～－32．00D的26例42眼高度近视眼于术前及术后6～9月行角膜地形图检查，并与同期的验光结果行对比。结果角膜地形图数值分析与临床效果有较大的差异，且综合指标呈下降趋势，与疗效不符。结论该差异的产生与地形图仪分析软件设定范围有关，手术增加的散光与切削区偏心有关，但该偏心多与视轴中心吻合，故对术后视力恢复无影响。

To evaluated the relation between corneal refractive change of to-pography and clinical refractive change after microlamellar keratectomy.For 42 eyes (26 cases )with high myopia(- 7.00D - 32.00D),corneal topography was evaluated by TMS- 2 videophoto keratography preoperatively and 6 ~ 9 months postoperatwely.The results were com-paired with the clinical refraction in same timesResultsThere was a difference between the postoperative potential results of corneal topogra-phy and acutal clinical results. The former was worser. Conchusions The reason of the difference may be that the corneal refractive change exceeds the linit of software of videophotokeratography. The increased astigmatism was associated with the decentration of ablatation.The decentration didn't effect the recovering of postoperative visual acuity because it is usually i-dentical to the visual axis.