超声乳化术中不同切口位置对散光的矫正效果

The impact of incision options on correcting pre existing corneal astigmatism in phacoemulsification

目的 :评价超声乳化术中采用不同切口位置矫正术前散光的疗效。方法 :选择角膜散光≥ 1.0DC的 5 7例 (6 6只眼 )施行超声乳化联合折叠式人工晶状体植入术的老年性白内障患者 ,分为三组。A组 2 2眼 ,顺规散光 ,做上方角膜缘切口 ;B组 2 2眼 ,逆规散光 ,做颞侧角膜缘切口 ;C组 (对照组 ) 2 2眼 ,包括顺规散光 5眼 ,逆规散光 6眼 ,斜轴散光 11眼 ,做右上 11点方位角膜缘切口 ,即相当于 12 0°轴向 ,比较术后角膜散光的变化情况。结果 :三组术后 3个月平均角膜散光度分别较术前减少 0 .5 5DC、0 .72DC和 0 .10DC。A、B两组分别与术前比较 ,差异有显著性 (P <0 .0 5 ) ,C组与术前比较差异无显著性 (P >0 .0 5 )。结论 :结合散光轴向正确选择超声乳化手术切口位置 ,可以有效矫正部分术前散光。

Objective:To evaluate the effect of the different incision options for correcting pre existing corneal astigmatism in phacoemulsification.Methods:Phacoemulsification and foldable intraocular lens implantation were performed on 57 cases(66 eyes with pre existing corneal astigmatism ≥1.0 DC),using a corneal limbal incision without suture. The changes in corneal astigmatism before and after surgery were compared in group A(22 eyes,incision at the superior for with the rule astigmatism),group B(22 eyes,incision at the temporal for against the rule astigmatism) and group C(22 eyes,incision at the superior nasal or superior temporal ignoring the astigmatism axis).Results:The corneal astigmatism changes between pre and post operations were 0.55 D,0.72 D and 0.10 D in groups A,B and C,respectively. The difference was statistically significant(P<0.05) in groups A and B,but there was no statistical significance(P<0.05) in group C.Conclusion:The choice of incision location has an influence on the correction of corneal astigmatism. [