Table 1.
Characteristics of the study groups.
Fig 1.
Double-angle plot of corneal astigmatism in the normal and high myopia group.
Most eyes have with-the-rule astigmatism (axis at 90°). The corneal astigmatism measurement was equivalent between IOLMaster and Pentacam HR for the HM group. However, the astigmatism magnitude was lower in Pentacam HR compared to IOLMaster by 0.14D in the normal group (p = 0.002).
Table 2.
Anterior chamber depth, anterior corneal keratometry and astigmatism data comparison between IOLMaster and Pentacam HR in the normal group and high myopia group.
Fig 2.
Differences in mean anterior chamber depth (ACD), flat keratometry (Flat K) and steep keratometry (Steep K) between IOLMaster (I) and Pentacam HR (P).
Pentacam HR showed higher ACD values than IOLMaster in the normal group (P = 0.003). The interdevice difference in ACD measurement was not statistically significant in the high myopia group (P = 0.280). IOLMaster demonstrated higher steep K than Pentacam HR for both normal and high myopia groups (P<0.001). IOLMaster also have higher flat K values for the HM groups (P<0.001) but agreed with Pentacam HR for the normal group (P = 0.119). Panel A, C, E for the normal group and Panel B, D, F for the high myopia group.
Fig 3.
Plots of axial length versus age and anterior chamber depth (ACD) versus age in both normal and high myopia groups.
The linear regression trend lines are solid in the normal group and dotted in the high myopia group. The ACD values of IOLMaster and Pentacam HR were demonstrated in panel B and panel C, respectively. For the normal group, age was negatively correlated with AL, IOLMaster ACD and Pentacam HR ACD (r = -0.395, P = 0.001; r = -0.715, P < 0.001; r = -0.643, P < 0.001). In the HM group, age was positively correlated with AL but negatively correlated with IOLMaster ACD and Pentacam HR ACD (r = 0.377, P = 0.003; r = -0.392, P = 0.002; r = -0.616, P < 0.001).