【摘要】 目的:在手术前存在角膜散光的患者中应用Toric IOL,报告初步的观察结果。方法:选择200806/200901在我院接受白内障超声乳化摘除及Toric IOL植入并且完成6mo随访的患者39例45眼,分别植入SN60T3,T4,T5 Acrysof Toric IOL,术后6mo时比较术前、术后的屈光结果。结果:术后6mo时T3,T4,T5各组的未矫正视力分别为0.73±0.20,0.92±0.16,0.85±0.23,残余散光为0.52±0.22D,平均轴位发生偏转为3.5±2.1度,各组分别为2.8±2.0,3.0±2.2,3.9±1.8度。结论:Acrysof Toric IOL在矫正术前角膜散光方面是很有价值的。
【关键词】 Acrysof Toric人工晶状体;角膜散光;矫正
Corneal astigmatism correction with the AcrySof Toric intraocular lens in cataract
surgery
Yong Zhang, Guang Qiao, Hao Zhang
Department of Ophthalmology,the 4th Hospital of Shenyang, Shenyang 110031, Liaoning Province, China
AbstractAIM: To evaluate astigmatism correction of the AcrySof Toric intraocular lens (IOL) in cataract patients.
METHODS: Thirtynine patients 45 eyes were implanted with the AcrySof Toric IOL by the same surgeon between June 2008 and January 2009. Three Toric models were evaluated in cylinder powers of 1.50 diopters (D) (SN60T3; T3 group, n=11), 2.25D (SN60T4; T4 group, n=17), and 3.00 D (SN60T5; T5 group, n=17) at the IOL plane. The patients were followed up for 6 months with pre and postoperatively refractive assessments performed.RESULTS: Six months postoperatively, the mean uncorrected visual acuity (UCVA) was 0.73±0.20 in the T3 group, 0.92±0.16 in the T4 group, 0.85±0.23 in the T5 group, respectively. Residual astigmatism was 0.52±0.22D. The mean IOL rotation was 3.5±2.1degrees, 2.8±2.0 in the T3 group, 3.0±2.2 in the T4 group, 3.9±1.8 in the T5 group, respectively.CONCLUSION: Implantation of the AcrySof Toric IOL proved to be successful in correcting corneal astigmatism in cataract patients.
KEYWORDS: Acrysof Toric intraocular lens; corneal astigmatism; correction
0引言
随着白内障手术技术的不断发展,白内障手术已经进入了屈光手术的范畴。采用3.0mm或更小的角膜隧道切口使得手术造成的角膜散光<0.50D[1],我们可以不再为手术源性散光困扰。但是在白内障患者中有15%~29%手术前就存在≥1.50D的角膜散光[2],这些散光如果不矫正会明显影响患者手术后的视觉质量。矫正患者手术前存在的角膜散光的方法有手术同时制作角膜缘松解切开、手术后作准分子激光矫正手术及新推出的植入可矫正散光的人工晶状体(Toric intraocular lens,Toric IOL)。我们在一些手术前存在角膜散光的患者中应用了Toric IOL,初步的观察结果报告如下。
1对象和方法
1.1对象
选择200806/200901在我院接受白内障超声乳化摘除及Toric IOL植入并且完成6mo随访的患者39例45眼,其中男19例,女20例,年龄38~76岁,排除合并存在的其它眼前节及眼底病变,手术前最佳矫正视力0.1~0.4。于手术前用IOL Master(Zeiss,德国)检查患者的角膜曲率及拟植入IOL的等效球镜度数,依据角膜曲率把患者分为3组,分别存在0.75~1.50,1.50~2.25,2.25~3.00D的术前角膜散光,根据Alcon公司网站提供的计算程序相应地选择SN60T3,T4,T5 Acrysof Toric人工晶状体,各组眼数分别为11,17,17眼。
1.2方法
首先在手术前根据Alcon公司网站提供的计算程序标记散光轴位,方法为将裂隙灯显微镜灯臂与镜臂夹角转为0°,窄裂隙条件下转动裂隙旋转钮至目标轴位,一定要保证裂隙光通过角膜正中央,用标记笔在角膜缘作标记,同时也要根据术者的习惯标记切口位置。所有手术均由同一名医生完成。手术采用表面麻醉下3.0mm透明角膜切口,连续环形撕囊,水核分离和水核分层后劈核法囊袋内超声乳化白内障摘除,囊袋内植入Acrysof Toric人工晶状体,散光轴与手术前标记对齐。随访观察:手术后1wk及6mo分别检查患者的裸眼视力及验光检查,视力采用国际标准视力表的小数记录法;术后6mo散瞳检查Toric IOL的轴位与目标轴位比较。
统计学分析:采用t检验进行统计学处理,P<0.05为有统计学意义。
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