方法：分别测量小切口非超声乳化白内障手术患者99例116眼的术前、术后3d； 1，2wk； 1，3，6mo； 1，2，3a的角膜水平曲率(horizontal corneal curvature， HCC)和垂直曲率值(vertical corneal curvature，VCC)，求出HCC和VCC的术后相对于术前的差值。用统计软件对术后HCC差值和VCC差值进行统计分析。

结果：术后3d，VCC减少2.01D，HCC增大1.62D，两者之间有显著差异(P<0.001)； 术后3mo内HCC和VCC差值均迅速减小，3mo时VCC差值-0.52D，HCC差值0.46D； 3mo后VCC和HCC差值均缓慢减少，6mo时VCC差值-0.29D，HCC差值0.29D，两者之间无显著差异(P=0.801)； 术后3a，VCC仍较术前小(-0.26D)，HCC较术前大(0.25D)。术后各时间点的角膜曲率差值进行配对t检验：术后3d至术后6mo的时间内，VCC和HCC均明显减小(P<0.001)，术后6mo到3a之间VCC(P=0.284)和HCC(P =1.000)无明显改变。

结论：小切口白内障手术术后短期角膜散光较大，手术方式需进一步改进以减少散光。

METHODS: In this study, the horizontal corneal curvature(HCC)and vertical corneal curvature(VCC)of 99 patients(116 eyes)were documented before and after cataract surgery,with the postoperative follow-up of 3d; 1, 2wk; 1, 3, 6mo; 1, 2, 3a. The difference value of the HCC and the VCC between preoperation and postoperation were calculated and statistically analyzed.

RESULTS: The VCC was deceased by 2.01D, while the HCC was increased by 1.62D on the 3d after surgery; the difference value of the HCC and VCC were both decreased acutely in the 3mo postoperationly(the difference value of the VCC was -0.52D and HCC was 0.46D); the difference value of the HCC and VCC both were decreased mildly after 3mo of postoperation, There was no significant difference between the difference value of HCC(0.29D)and VCC(-0.29D)at 6mo(P=0.801); VCC was still smaller than that of preoperation(-0.26D), and HCC was larger than that of preoperation(0.25D)at the 3a. Paired t test was performed in these curvature differences, which both decreased apparently from 3d to 6mo after surgery(P<0.001), while they stayed still from 6mo to 3a postoperatively(VCC: P=0.284; HCC:P=1.000).

CONCLUSION: It remains astigmatism for a short time after small-incision cataract surgery and the treatment requires improvement so as to minimize the astigmatism as much as possible.