目的 ：观察巩膜切口深度对硬性人工晶状体在白内障超声乳化术后散光的影响。

方法：依据术前角膜地形图测角膜散光度数46例46眼，均行巩膜缘后3mm水平切口，术后visante oct分两组：A组切口深度为1/2巩膜深度(23眼)； B组切口深度为1/3巩膜深度(23眼)； 分别于术后1wk； 1，3mo观察两组角膜散光情况，并进行统计分析。

结果：A，B组术后裸眼视力均有明显改善，同时根据角膜地形图的检测结果，术后散光1，3mo与术后1wk相比，角膜散光度数有所回退，A组具有统计学差异。

结论：1/2巩膜切口对硬性人工晶状体在白内障超声乳化术后散光影响较小。

METHODS: Corneal astigmatism in 46 cases(46 eyes)was measured based on preoperative corneal topography, then they underwent horizontal limbal incision 3mm from the sclera edge, after the operation, they were divided into 2 groups by visante oct: group A of incision depth of 1/2 the depth of the sclera(23 eyes); B group incision depth of 1/3 the depth of the sclera(23 eyes); respectively, after l week, 1 month, 3 months, corneal astigmatism was observed and statistically analyzed.

RESULTS: Postoperatively, uncorrected visual acuity in groups A, B was significantly improved, while according to the test results of corneal topography, astigmatism of postoperative 1 month, 3 months was decreased compared with astigmatism of postoperative 1 week group A had statistical significance.

CONCLUSION: 1/2 scleral incision has less effect on astigmatism for rigid intraocular lens after cataract phacoemulsification.