Statistical analysis
We used SPSS (ver. 22.0; SPSS Inc, Chicago, IL) for statistical analysis. The repeated measurements were used to calculate the coefficient of variation (CoV) to judge the repeatability of measurements for each device. We used the Shapiro-Wilk test to evaluate the normal distribution of continuous variables. Pearson correlation analysis was used to analyze the correlation between the AL, CCT, and corneal curvature of the two devices. Paired 