术前3天常规抗生素滴眼液点眼,并行裸眼远视力(uncorrected visual acuity,UCVA)、最佳矫正远视力(best corrected visual acuity,BCVA)、裂隙灯、眼底镜检查、角膜内皮细胞检查、眼部A超及B超、角膜曲率等。行白内障超声乳化摘除联合人工晶状体植入术,同一手术者施行手术,术中采用连续居中环形撕囊,直径大小约5.5 mm,I/A 注吸手柄行后囊膜及前囊口囊膜抛光,植入人工晶状体,本研究共应用三种人工晶状体(Rayner920H 12例、Zeiss509M 9例、SOFTEC HD 6例)。术后常规抗生素及激素滴眼液点眼。记录术后1天、1周、1个月的裸眼远视力、最佳矫正远视力、屈光度。本研究中所记录的视力值均需转换成相应的Log MAR视力[logMAR值=log(1/小数视力值)]。其中,视力为指数的患者其LogMAR视力值记为2.0,视力为手动的患者其LogMAR视力值记为3.0,视力为光感的患者其LogMAR视力值记为4.0。屈光度检查使用电脑验光仪结合综合验光仪主觉验光所得。眼轴长度及晶状体厚度均采用IOL Master生物测量仪检查。使用To m e y SS1000 AS-OCT测量ELP。ELP测量及图像分析由同一检查者完成,在自然光条件下进行检查。应用Tomey SS1000 A S - O CT自带的前房测量工具测量中央前房深度和ELP。中央前房深度为瞳孔中心角膜后表面到晶状体前表面的距离。ELP为在视轴上瞳孔中心角膜后表面到人工晶状体前表面的距离。人工晶状体的实际轴向运动为术后随访各时间段ELP变化的均方根(root mean square,RMS)[2]。
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