方法：白内障患者46例，在Orbscan检测下，按角膜Simk值的转化值Polar K分为A组：20例20眼，Polar K>1.5； B组：26例26眼，Polar K<1.5。所有患者行白内障双散光轴向切口，由同一位手术医师行超声乳化白内障吸除人工晶状体植入术。观察两组患者手术前后角膜散光的变化。

结果：A组术前与术后各观察点Polar K比较，差异均有显著统计学意义，术后1mo比术前减少角膜Polar K 1.3左右。B组术前与术后第2wk的Polar K比较，差异有显著统计学意义。两组之间Polar K在术前及术后第2wk的差异有统计学意义。

结论：双散光轴向切口对于高角膜Polar K患眼有较强的散光矫正作用，但对于低角膜Polar K患眼几乎无矫正作用，但也不增加术后角膜Polar K。

METHODS: Forty-six cases of cataract patients were collected and divided into two groups A, B according to Polar K. Group A had 20 cases(20 eyes)and group B had 26 cases(26 eyes). Detected by Orbscan, the corneal Polar K of the group A was more than 1.5 and the Polar K of group B was less than 1.5. Double astigmatism axial incisions were performed on all patients, and all cataract operations with phacoemulsification with intraocular lens implantation were implemented by the same physician. The preoperative and postoperative changes of corneal astigmatism between two groups were observed.

RESULTS: In group A, the comparisons of Polar K preoperative and postoperative had significant statistical significance. Double astigmatism axial incisions decreased about 1.3 corneal Polar K after 1mo compared with pre-operative. In group B, the comparisons of Polar K at 2wk after operation had statistically significance. The comparisons of Polar K preoperative and at 2wk after operation had statistically significance between two groups.

CONCLUSION:Double astigmatism axial incisions have strong astigmatism corrective action to high Polar K eyes and almost no corrective action to the low Polar K eyes. But it does not increase postoperative corneal Polar K.