中文摘要：

目的探讨3.2 mm和5.5 mm透明角膜不缝合自闭式切口白内障手术术后散光情况,并对其手术效果进行对比.方法老年性白内障60例(63眼),随机分为两组,分别采用3.2 mm和5.5 mm透明角膜切口.除切口大小、人工晶状体类型及人工晶状体植入方法不同外,其余手术方法均相同.术前及术后定期观察视力、角膜散光及角膜内皮细胞计数情况,并进行统计学比较.结果3.2 mm切口组术后散光明显小于5.5 mm切口组(P＜0.05)且术后视力优于5.5 mm组(P＜0.05),两组间比较统计学差异有显著性意义,但是随着时间推移,两组间统计学差异进行性减小.两组角膜内皮细胞丧失程度未见统计学差异(P＞0.05).结论3.2mm透明角膜切口白内障超声乳化术术后视力恢复快,手术源性散光小,手术效果优于5.5mm组.

英文摘要：

Objective To evaluate the surgical induced astigmatism and other surgical outcomes in 3.2 mm and 5.5 mm clear corneal sutureless self-sealing incision for cataract operation. Methods 63 eyes of 60 cases with age-related cataract were divided into two groups randomly, out of which 32 eyes were in 3.2 mm and 31 eyes in 5.Smm incision groups. Except the incision size, lens type and implantation technique, other surgical methods were identical. Uncorrected visual acuity, corneal topography and corneal endothelium count were measured preoperatively and postoperatively. Results Eyes in 3.2 mm incision group had significantly less surgical induced astigmatism than in 5.5 mm incision group throughout the study（ P 〈 0.05）. The visual acuity also was better and stable in 3.2 mm group starting from the first day of operation （P 〈 0.05）. But the differences decreased progressively with time. There was no statistically significant difference in corneal endothelium loss between two groups （ P 〉 0.05 ）. Conclusion The 3.2 mm clear corneal incision cataract surgery leds to early recovery of visual function in short term and less induced astigmatism.