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目的探讨角膜地形图和角膜曲率计对屈光手术前、后角膜散光的应用价值。方法采用计算机辅助的角膜地形图、角膜曲率计及散瞳验光三种测量散光的方法，对屈光不正患者３６０只眼进行检查，同时对准分子激光角膜切削术（ｐｈｏｔｏｒｅｆｒａｃｔｉｖｅｋｅｒａｔｅｃｔｏｍｙ，ＰＲＫ）后７２只眼和准分子激光原位角膜磨镶术（ｅｘｃｉｍｅｒｌａｓｅｒｉｎｓｉｔｕｋｅｒａｔｏｍｉｌｅｕｓｉｓ，ＬＡＳＩＫ）后９５只眼的角膜散光用角膜地形图和角膜曲率计进行测量并比较。结果术前三组测量方法在散光轴位方面差异无显著性（Ｐ＞０．０５）。在散光度数上，角膜地形图△ＳｉｍＫ和角膜曲率计△Ｋ间差异无显著性（Ｐ＞０．０５）；而散瞳验光组与另两组间差异有显著性（Ｐ＜０．０１）。ＰＲＫ和ＬＡＳＩＫ术后△ＳｉｍＫ与△Ｋ值间差异有显著性（Ｐ＜０．０１）。结论角膜曲率计与角膜地形图对术前角膜散光测量具有相似的临床价值，角膜地形图图形与参数△ＳｉｍＫ值有关。但术后角膜地形图△ＳｉｍＫ测量的角膜散光较为准确
Objective To investigate the value of corneal topography and keratometer in the corneal astigmatism before and after refractive surgery. Methods A total of 360 eyes of patients with ametropia were examined by computer assisted corneal topography, corneal curvature meter and mydriatic optometry. Meanwhile, 72 eyes underwent photorefractive keratectomy (PRK) Corneal astigmatism in 95 eyes after eye and excimer laser in situ keratomileusis (LASIK) was measured and compared with corneal topography and keratometer. Results There was no significant difference in axial position of three groups before operation (P> 0.05). There was no significant difference between △ SimK corneal topography △ K and corneal curvature △ K in astigmatism degree (P> 0.05), but there was a significant difference between the two groups (P <0.01) . There was a significant difference between △ SimK and △ K values after PRK and LASIK (P <0.01). Conclusions Keratometer and corneal topography have similar clinical value to the preoperative corneal astigmatism measurement. The corneal topography graph is related to the parameter △ SimK value. However, corneal topography △ SimK measurement of corneal astigmatism more accurate