双辅助切口白内障超声乳化术对角膜屈光的影响

Clinical Observation of Corneal Refractive Power Induced by Secondary Incision After Phacoemulsification

【目的】评价小切口白内障超声乳化吸除术中,双辅助切口对角膜屈光的影响。【方法】20例38眼,行白内障超声乳化吸除、折叠式人工晶体植入术,在角巩膜缘3、9点位透明角膜两处行辅助切口。应用TOPCON角膜曲率仪,于术前和术后1周、1个月、3个月对角膜进行检测,比较分析角膜屈光的变化。【结果】术后角膜曲率同术前值比较,差异均无显著性(P>0.05)。术后1周角膜散光与术后3个月的数值比较,差异有显著性(P<0.05),术前和术后1个月角膜散光与术后3个月的数值比较,差异均无显著性(P>0.05)。【结论】双辅助切口的超声乳化白内障吸除术,对角膜曲率影响非常小;术后出现的角膜散光,可于术后1个月内显著减少;1个月后,角膜散光情况已基本稳定。

[Objective]To evaluate the changes of the corneal refractive power induced by secondary incision after phacoemulsification. [Methods]Phacoemulsification was performed on 20 cases （38 eyes） without suture for a sclera incision and two clear corneal secondary incisions. The changes of the corneal refractive power and astigmatism before and after operation were compared. [Results]The changes of the corneal refractive power after operation were of no significant difference （ P〉0.05）. At one week after operation, the astigmatism induced by operation was （0.98±0.78）D, the difference being statistically significant （ P 〈0.05） ; otherwise, the astigmatism induced by operation was of no significant difference with before operation, one month after operation and three months after operation （ P 〉0.05）. [Conclusion]Surgically induced corneal refraction is very small with two clear corneal secondary incisions in phacoemulsification without suture. Within one month, surgically induced astigmatism can become stable postoperatively.