Acrysof Toric人工晶状体植入术后旋转稳定性观察

A study of stability of the AcrySof Toric intraocular lens

目的评价Acrysof Toric SA60TT型系列人工晶状体植入术后3个月在囊袋内位置(旋转)的稳定性。方法31例(39眼)白内障超声乳化Acrysof Toric SA60TT型系列人工晶状体植入术,其中11眼角膜散光度小于1.50D者植入SA60T3型(A组),18眼散光度为1.50D^2.00D者植入SA60T4型(B组),10眼散光度大于2.00D者植入SA60T5型(C组)。观察术前及术后3个月的视力、角膜散光及人工晶状体的旋转度,并观察人工晶状体的旋转度与角膜散光等的关系。结果术后3月,3组人工晶状体旋转度之间无统计学意义,术后3月全部患者人工晶状体旋转的绝对平均值为2.5°±1.9°,15眼(38.46%)为顺时针旋转,最大值为10°,16眼(41.03%)为逆时针旋转,最大值为5°,8眼(20.51%)无旋转。36眼(92.31%)旋转小于5°,25眼(65.10%)旋转小于2°,旋转的度数与眼轴长、术前角膜散光度均无相关性。结论Acrysof Toric SA60TT系列人工晶状体在囊袋内有较好的旋转稳定性。

Objective To evaluate the long term rotational stability of the three types of AcrySof SA60TT toric intraocular lenses （Alcon, Switzerland） implanted in cataract surgery. Methods A retrospective study of 39 eyes in 31 patients. All patients underwent similar uncomplicated phaeoemulsifieation cataract surgery. 11 eyes with corneal astigmatism of less than 1.5 D were implanted with the AcrySof SA60T3 intraocular lens（ Group A）. 18 eyes with astigmatism between 1.5 D and 2.00 D received the SA60T4 intraoeular lens（ Group B）, and 10 eyes with more than 2.00 D of corneal astigmatism received the SA60T5 intraocular lens （Group C）. The rotational stability of intraoeular lenses, acuity of vision, and corneal astigmatism were observed preoperativey and 3 month postoperatively. Results There was no significant difference in the rotational stability of the three types of toric intraocular lenses. Overall, the postoperative rotation was within 5 degrees in 36 eyes （92.3%） and within 2 degrees in 25 eyes （65.10%）. The mean absolute rotation was （2.5 ± 1.9 ） degrees. No lens showed more than 10 degrees of rotation, and no lens required secondary repositioning. There was no trend for either clockwise or anti-clockwise rotation. The rotation degree did not relate with axial length or preoperative corneal astigmatism. Conclusion Once placed to it＇s position, each of the three types of the AcrySof SA60TT torie intraoeular lens demonstrates rotational stability in the capsular bag.