方法：回顾性分析2013-03/06于我院接受白内障手术的年龄相关性白内障患者的单眼数据。术前分别使用A超和角膜曲率计以及Lenstar测量眼生物参数，并使用SRK/T公式进行IOL度数的计算。所有纳入患者接受白内障摘除联合IOL植入术，术中IOL植入囊袋内。术后3mo进行检影验光。比较两种检查方法测量的眼轴及角膜平均曲率，统计分析患者术前及术后视力的变化，术后PE及PE绝对值(absolute value of PE， APE)，对PE、APE与眼轴及曲率行相关性分析。

结果：术前Lenstar测量眼轴为24.68±1.70mm，A超为24.42±1.65mm，两者间有统计学差异(t=-12.688，P<0.001)，同时具有显著相关(r=0.992，P<0.001)，两者95% LoA范围为-0.18～0.69mm。术前Lenstar测量角膜平均曲率为44.22±1.03D，曲率计测量值平均为44.19±1.04D，两种方法间无统计学差异(t=-1.241，P=0.217)，两种方法间相关性具有统计学意义(r=0.963，P<0.001)，95% LoA为-0.52～0.58D。术后Lenstar PE为0.05±0.23D，常规超声测量PE为-0.35±0.76D，两者间有统计学差异(t=-5.494，P<0.001)。使用Lenstar和常规超声APE分别为0.18±0.14D和0.56±0.62D，两种方法间有统计学差异(t=6.379，P<0.001)。

结论：Lenstar可进行精确的眼部生物参数测量，术后PE较常规超声明显降低，可用于白内障手术IOL度数的精确计算。

METHODS: The data of age-related cataract patients were retrospectively analyzed from March, 2013 to June, 2013 in our hospital. Preoperative measurements of ocular biological parameters and calculation of intraocular lens(IOL)degree using SRK/T's formula with ultrasound, keratometry and Lenstar were performed. Cataract extraction combined with IOL implantation in capsule was taken in every patient. Retinoscopy was taken postoperatively after 3 months. Comparison of the two inspection methods for measuring axial length, mean corneal curvature and postoperative refractive PE and absolute value of PE(APE).

RESULTS: Preoperative axial length was 24.68±1.70mm and 24.42±1.65mm with Lenstar and ultrasound, respectively, and there was significant difference(t=-12.688, P<0.001)and significant correlation(r=0.992, P<0.001)between different measurement, and the 95% LoA was in the range between -0.18mm and 0.69mm. Preoperative corneal curvature was 44.22±1.03D and 44.19±1.04D with Lenstar and keratometry, respectively, there was no statistical differences between two methods(t=-1.241, P=0.217), but was the significant correlation(r=0.963, P<0.001), and 95% LoA between 0.52D and 0.58D. PE was 0.05±0.23D and -0.35±0.76D with Lenstar and ultrasound, respectively(t=-5.494, P<0.001). APE were 0.18±0.14D and 0.56±0.62D with Lenstar and conventional ultrasound, respectively(t=6.379, P<0.001).

CONCLUSION: Accurate ocular biological parameters can be achieved with Lenstar, and postoperative PE is more precise with Lenstar compared with conventional ultrasound. Lenstar can be used for precise calculation of IOL degree in cataract operation.