小切口白内障术后的早期角膜地形图分析

目的：研究白内障小切口术后角膜形态变化特点。方法：用角膜地形图对27例（34眼）白内障小切口手术患者进行检查，分析其术前，术后1周、1月、3月的角膜地表图变化。结果：术后1周仅产生手术源性散光0.52D，术后1月角膜散光及CIM值（角膜不规则系数）趋向稳定，裸眼视力≥0.5占26眼（76.42%），SF值（角膜形状系数）术前术后无明显变化。结论：小切口具有早期角膜形态变化小、散光稳定、视力恢复快等优点，角膜地形图可准确全面反映白内障术后角膜形态变化。

Corneal topographicanalysis of small incision in cataract surgery

Objective:To study corneal topographic changes after cataract surgery through small incision.Methods:Corneal topography of 34 eyes in 27 patients who had undergone small incision cataract surgery was analyzed preoperatively and at 1 week, 1 month, 3 months postoperatively. Results:Surgically induced astigmatic change of 0.52D was observed at 1 week postoperatively. Corneal astigmatism and CIM remained quite stable 1 month after surgery. 26 eyes(76.42%) obtained uncorrected visual acuity to 0.5 or better. Compared with preoperative statistics, no significant change of SF was found postoperatively.Conclusion:The results suggested that the small incision produces less astigmatism postoperatively, faster postoperative recovery, less corneal topographic change early after surgery. Computerized videokeratography system is an effective way to measure precisely the change of corneal topography after cataract surgery.