Acrysof Toric人工晶状体矫正角膜散光的临床研究

目的 评价AcrysofToric复曲面人工晶状体在白内障手术中矫正角膜源性散光的临床效果及其旋转稳定性.方法 随机选取2009年6月至2010年5月行白内障手术的患者,接受白内障超声乳化吸出联合Acrysof ToricIOL(SN60TT)植入术的35例(37只眼)做为实验组,其中T3(柱镜为1.50D)17只眼,T4(柱镜为2.25D)10只眼,15(柱镜为3.00D) 10只眼.随机选取同期接受白内障超声乳化吸出联合Acrysof Natural IOL (SN60AT)植入术的30例(35只眼)做为对照组.全部手术均采用角膜屈光力陡峭子午线透明角膜切口.观察术后3个月术眼裸眼视力(uncorrected visual acuity,UCVA)及最佳矫正视力(best corrected visual acuity,BCVA)、术后术眼角膜散光及预期与实际残余散光、IOL旋转度数.结果 术后3个月实验组UCVA为0.65±0.23,对照组为0.55±0.30,两组差异有统计学意义(t=9.526,P ＜0.01),实验组BCVA为0.81±0.17,对照组为0.79±0.29,两组差异无统计学意义(t=0.392,P＞0.05).术后残余散光实验组为(0.55±O.17)D,对照组为(1.89±0.35)D,差异有统计学意义(t=4.215,P＜0.01).实验组IOL轴旋转平均为(2.5±1.7)°,有34只眼(91.9％)的旋转小于5°.结论 术后3个月观察表明植入Acrysof Toric IOL可以有效且稳定地矫正白内障患者术前存在的角膜散光.

Clinical study of Acrysof Toric intraocular lens implantation for corneal astigmatism correction

Objective To evaluate the result of TORIC intraocular lens (IOL) implantation in correcting corneal astigmatism and the rotation stability in cataract surgery.Method Randomized group 1 (37 eyes) from June 2009 to May 2010 and group 2 (35 eyes) in the same period underwent similar phacoemulsification procedure.Group 1 were combined with Acrysof Toric IOL (SN60TT) implantation of T3 (17 eyes),T4 (10 eyes) and T5 (10eyes).Group 2 with preoperative corneal astigmatism more than 1.00 diopter (D) were combined with Acrysof Natural IOL (SN60AT) and incision on steep axis.Patients were followed up for 3 months,the uncorrected visual acuity (UCVA),best corrected visual acuity (BCVA),residual cylinders,and TORIC IOL axis was measured.Result Three months after operation,the UCVA of all eyes in Group 1 were 0.65± 0.23; and were 0.55± 0.30 in Group 2,it was statistically significant (t =9.526,P ＜0.01).The BCVA in Group 1 were 0.81± 0.17,and were 0.79± 0.29in Group 2,there was no difference between two groups in BCVA (t =0.392,P ＞0.05).The mean residual astigmatism after surgery in Group 1 was (0.55± 0.17)D,and was (1.89± 0.35)D in Group 2,there was significant difference between two groups.The mean axis rotation of TORIC IOL was (2.5± 1.7) degree in group 1,and less than 5 degrees in 91.9％of eyes.Conclusions The SN60TT TORIC IOL show good effectiveness and stability in correcting pre-existing astigmatism in cataract patients.