目的:探讨手法小切口白内障摘出联合人工晶状体植入术后角膜散光的变化。方法:将57例86眼老年性白内障患者随机分成两组,A组42眼行手法小切口白内障摘出联合人工晶状体植入术,B组44眼行白内障超声乳化联合人工晶状体植入术。分别于术前、术后1,3mo用角膜地形图测量角膜散光度并计算手术源性散光。结果:术后1mo,A组与B组的平均手术源性散光分别为1.05±0.49,0.71±0.45,差异有统计学意义(P<0.05);术后3mo,A组与B组的平均手术源性散光分别为0.66±0.34,0.59±0.31,差异无统计学意义(P>0.05)。结论:术后早期白内障超声乳化术比手法小切口白内障摘出术引起的角膜屈光改变更小,术后3mo两者的屈光改变接近一致,均达到屈光稳定状态。

AIM:To study the change of corneal astigmatism induced by a superior incision in manual small incision cataract surgery (MSICS). ·METHODS:Totally 57 patients 86 eyes were randomly divided into two groups depending on preexisting astigmatism. 42 eyes in group A underwent MSICS and 44 eyes in group B underwent phacoemulsification(Phaco). The surgically induced astigmatism(SIA) were measured by corneal topography preoperatively and 1 month,3 months postoperatively. ·RESULTS:The mean SIA was higher in the MSICS group than that in the Phaco group 1 month after surgery and there were statistical differences between these two groups(P<0.05). The mean SIA was still a little higher in the MSICS group than that in the Phaco group 3 months after surgery but the differences were not statistically significant (P>0.05). ·CONCLUSION:The MSICS induced a slightly higher degree of SIA than Phaco,however there is no significant difference in the mean SIA at postoperative month 3. Both groups tend to stabilization of refraction 3 months after surgery.

R779.66