Tecnis Z9000人工晶状体植入术后的视功能改变

目的:评价非球面人工晶状体(intraocular lens,IOL)TecnisZ9000对提高年龄相关性白内障患者术后视功能的作用。方法:选取年龄相关性白内障患者34例36眼,其中18眼为Tecnis Z9000组,18眼为传统球面人工晶状体组。检查术后3mo最佳矫正远视力,不同亮度环境及有、无散瞳条件下的对比敏感度(contrast sensitivity,CS)。结果:手术后3mo最佳矫正远视力Tecnis Z9000组为0.89±0.17,球面人工晶状体组为0.76±0.16,两组差异有显著性(P<0.05)。正常瞳孔下,两组晶状体在不同空间频率(1.5,3,6,12,18c/d)、不同照明条件下CS无显著差别。散瞳后Tecnis组亮环境(亮度为85cd/m2)下的12,18c/dCS及暗环境(亮度为3cd/m2)下1.5,3c/dCS均分别与同条件下的球面人工晶状体组比较差异有显著性。结论:白内障术后早期,Tecnis Z9000可提高最佳矫正远视力和对比敏感度,改善术眼视功能。

Clinical study of visual function after Tecnis Z9000 intraocular lens implantation

AIM:To investigate the effectiveness of aspheric intraocular lens,Tecnis Z9000,in the treatment of phacoe-mulsification for the patients with age-related cataract.·METHODS:Thirty-four age-related cataract patients (36 eyes) were selected and treated with phacoemulsification.Group 1 (18 eyes) was implanted the aspheric IOL (Tecnis Z9000,AMO) and group 2 (18 eyes) was implanted the spheric IOL (Acrysof SA60AT,ALCON).Complete ophth-almologic examination was performed preoperatively,on day 1 and month 3 postoperatively.Best-spectacle corre-cted visual acuity (BSCVA) and contrast sensitivity (CS) were performed on month 3 postoperatively.·RESULTS:The mean best corrected visual acuity (BCVA) of Tecnis group after 3 months was 0.89±0.17,while the Acrysof SA60AT group was 0.76±0.16.BCVA of both groups were significantly improved.But Tecnis group got better BCVA than Acrysof SA60AT group (P=0.02).As for physiologically dilated pupil,there was no significant difference in contrast sensitivity between two groups.After mydriasis,contrast sensitivity in log unit at 12,18cpd in Tecnis group were significantly higher than those in Acrysof SA60AT group under photopic condition (P<0.05).Contrast sensitivity at 1.5cpd and 3cpd in Tecnis group were significantly higher than those in Acrysof SA60AT group under mesopic condition (P<0.05).·CONCLUSION:Early period after cataract surgery,aspheric IOLs (Tecnis IOL) can improve BCVA and increase the contrast sensitivity of higher frequencies under photopic condition and middle and low frequencies under mesopic condition in patients with large pupils and improve functional vision.·