AIM: To research the impact ofdouble astigmatism axial incisions on different kinds of corneal astigmatism.

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.