方法：分别用3种仪器对158例(158眼)白内障患者进行眼部生物测量，比较角膜中央厚度、角膜曲率、前房深度和眼轴长度的结果，采用重复测量的方差分析及Pearson相关分析，一致性比较采用Bland-Altman统计分析法。

结果：Lenstar 和 Pentacam测得的角膜中央厚度分别为536.54±27.90μm和541.46±29.85μm，两者差异有统计学意义(t=-5.439； P<0.001)； K值分别为43.87±1.45D和43.86±1.44 D，两者差异无明显统计学意义(t=-0.348， P>0.05)。Pentacam、Lenstar和 A超测量的前房深度分别是2.73±0.38mm、2.71±0.38mm和2.85±0.40mm，三者差异均有统计学意义(F=309.94， P<0.001)，Pearson 相关分析显示三者呈正相关(r=0.989， 0.978， and 0.977； P<0.001)，但变异系数较小(CV=3.12%)。A超和Lenstar测量的眼轴长度分别是24.28±1.70mm和24.52±1.73mm，两者差异有统计学意义(t=-19.482， P<0.001， r=0.996； P<0.001)。Bland-Altman分析显示，对于这几种眼前节参数，三种方法测量的一致性较好。

结论：三种仪器测量的结果尽管有一定差异，但Lenstar 和Pentacam的生物测量可重复性好，操作简便更易用于白内障患者的检查。

METHODS: A total of 158 eyes of 158 patients were examined in this study. The CCT, average K, ACD and AL obtained by Lenstar and/or Pentacam were compared with those obtained from US pachymetry using repeated-measures analysis of variance, Pearson correlation coefficients and Bland-Altman analyses.

RESULTS: The mean CCT obtained using Lenstar and Pentacam were 536.54±27.90μm and 541.46±29.85μm(t=-5.439; P<0.001). The mean Km obtained using Lenstar and Pentacam methods were 43.87±1.45D and 43.86±1.44 D(t=-0.348, P>0.05). The mean ACD measured using the Pentacam, Lenstar, and US pachymetry were 2.73±0.38mm, 2.71±0.38mm, and 2.85±0.40 mm, respectively(F=309.94, P<0.001), and they were positively correlated(r=0.989, 0.978, and 0.977; P<0.001)and the coefficient of variation was small(3.12%). The mean AL obtained by US pachymetry and Lenstar were 24.28±1.70mm and 24.52±1.73 mm, respectively(t=-19.482, P<0.001, r=0.996; P<0.001). The Bland-Altman analysis showed that the three methods were comparable for CCT, Km, ACD and AL.

CONCLUSION: Although there were statistically significant differences, the measurements obtained by the Lenstar and the Pentacam were highly repeatable and the instruments easy to use.