The clinical study in the effect of the chosen incision on corneal astigmatism after cataract surgery

Objective To evaluate the effect of the chosen incision on corneal astigmatism after cataract surgery.Methods 195 patients of age-related cataract were randomly divided into two groups:the chosen incision group(Group A,96 cases) and superior limbus incision group(Group B,99 cases).On the day before operation,1 week,1 month and 3 months after operation,each patient was examined with corneal topography to observe the corneal astigmatism.Results Preoperative corneal astigmatisms were (1.15-± 0.07)D in group A and (1.16 ±0.07) D in group B.There was no statistically significant different (P ＞0.05).1 week postoperatively,the astigmatism value were (2.16 ±0.09) D in group A and (1.33 ±0.09) D in group B.1 month postoperatively,the astigmatism value were (0.96 ±0.07) D in group A and (1.24 ±0.07) D in group B.3 month postoperatively,the astigmatism value were (0.89 ± 0.06) D in group A and (1.24 ±0.08) D in group B.The differences between the two groups were statistically significant (P ＜ 0.01).Conclusion The chosen incision could reduce postoperative astigmatism to a certain extent. Key words: Cataract; Astigmatism