方法：选取我院收治的白内障患者，将患者随机分为对照组(与角膜缘相反弧形巩膜隧道切口组)和观察组(角膜上方或颞上方透明角膜切口组)。比较分析两组患者术后1wk； 1，3mo不同时间角膜散光度的变化情况及视力的变化情况。

结果：与对照组患者相比，观察组患者术后1wk； 1，3mo平均角膜散光度及手术源性角膜散光度均明显降低，裸眼视力及矫正视力均明显提高，差异具有统计学意义(P<0.05)。与对照组患者相比，观察组患者手术所用时间明显缩短，差异具有统计学意义(P<0.05)。

结论：角膜中心远处的小切口超声乳化术，能够减少患者术后散光度，促进患者术后视力提高，为进一步加强患者的临床治疗效果提供了保障。

METHODS: The cataract patients were selected in our hospital. The patients were divided into control group(corneal limbus opposite curved scleral tunnel incision group)and observation group(above the top of cornea or temporal transparent corneal incision group)randomly. At 1wk; 1 and 3mo after surgery, the change of corneal astigmatism and vision of the patients in two groups were compared and analyzed.

RESULTS:Compared with control group, 1wk; 1 and 3mo after surgery, the average corneal astigmatism and surgically induced corneal astigmatism of the patients in observation group were decreased significantly. The visual acuity and corrected visual acuity were increased significantly. There was statistically significant(P<0.05). Compared with control group, the time for the operation of the patients in observation group was shorted significantly, there were statistically significant(P<0.05).

CONCLUSION: Center distance and small incision corneal phacoemulsification can reduce postoperative astigmatism and improve postoperative visual acuity for cataract patients. It provides guarantee for further strengthen the clinical treated effect for cataract patients.