Table 1.

Baseline Second-Order Zernike Coefficients (j = 3–5), HORMS, Refractive Power, and Structural Parameters for Each Eye Pre-IRIS

Parameter	Cat 1 OD	Cat 1 OS	Cat 2 OD	Cat 2 OS
Zernike coefficients, μm
C3, astigmatism at 45°	−0.089 ± 0.086	0.259 ± 0.109	0.221 ± 0.053	0.043 ± 0.093
C4, defocus	0.087 ± 0.160	0.091 ± 0.061	0.013 ± 0.051	−0.091 ± 0.059
C5, astigmatism at 0° or 90°	0.022 ± 0.130	−0.171 ± 0.070	−0.004 ± 0.082	−0.196 ± 0.067
HORMS, μm	0.225 ± 0.053	0.269 ± 0.110	0.214 ± 0.031	0.227 ± 0.028
Refractive power, D
Defocus	0.3 ± 0.5	0.3 ± 0.2	0.0 ± 0.2	−0.3 ± 0.2
Cylinder	−0.7 ± 0.3	−1.4 ± 0.5	−1.0 ± 0.2	−1.0 ± 0.3
Thickness, μm
Epithelial	59 ± 3	57 ± 3	57 ± 5	56 ± 5
Stromal	500 ± 3	501 ± 3	556 ± 9	567 ± 5
Radius of curvature, mm
Tear film-epithelium	8.1 ± 0.2	8.18 ± 0.09	8.8 ± 0.1	8.9 ± 0.2
Epithelium-stroma	8.0 ± 0.2	7.9 ± 0.2	8.6 ± 0.2	8.9 ± 0.2
Stroma-endothelium	7.5 ± 0.2	7.0 ± 0.1	7.9 ± 0.2	8.2 ± 0.4

The values are given as mean ± SD.