Control | Upper eyelid | Lower eyelid | Both eyelids | p-value | |
---|---|---|---|---|---|
n | 70 | 22 | 16 | 6 | |
Gender (M:F) | 33:37 | 10:12 | 3:13 | 6:0 | |
Age (year) | 42.86 ± 14.18 | 41.27 ± 12.41 | 38.63 ± 16.74 | 35.83 ± 11.16 | 0.519 |
CCT (μm) | 547.46 ± 37.69 | 5583.27 ± 42.50 | 528.25 ± 45.57 | 555.00 ± 28.33 | 0.136 |
Average keratometry by ARK (D) | 43.03 ± 1.72 | 43.38 ± 1.69 | 42.18 ± 2.58 | 42.82 ± 1.44 | 0.269 |
Astigmatism by ARK (D) | -0.79 ± 0.58 | −1.12 ± 1.93 | −0.88 ± 0.85 | −0.50 ± 0.45 | 0.490 |
Axis by ARK (°) | 101.48 ± 65.26 | 118.16 ± 67.99 | 102.50 ± 53.94 | 92.00 ± 57.73 | 0.750 |
SimK (D) | 42.96 ± 4.08 | 43.11 ± 1.69 | 41.51 ± 2.99 | 42.42 ± 1.21 | 0.470 |
Astigmatism by simK (D) | 1.17 ± 0.78 | 2.01 ± 1.27 | 0.98 ± 0.59 | 1.23 ± 1.26 | 0.001* |
Axis by simK (°) | 84.47 ± 39.20 | 83.05 ± 25.31 | 88.31 ± 27.04 | 84.50 ± 43.78 | 0.470 |
Mean K of posterior surface (D) | −6.29 ± 0.28 | −6.29 ± 0.29 | −6.24 ± 0.15 | −6.16 ± 0.25 | 0.653 |
Astigmatism of posterior surface (D) | −0.43 ± 0.32 | −0.53 ± 0.32 | −0.36 ± 0.13 | −0.42 ± 0.16 | 0.336 |
Total RMS (μm) | 1.71 ± 0.59 | 2.35 ± 1.13 | 1.46 ± 0.39 | 1.96 ± 1.47 | 0.002* |
2nd order aberration (μm) | 1.48 ± 0.55 | 2.11 ± 1.04 | 1.23 ± 0.31 | 1.24 ± 0.20 | <0.001* |
Oblique astigmatism (Z−2 2; μm) | −0.05 ± 0.45 | 0.33 ± 0.57 | −0.03 ± 0.40 | 0.21 ± 0.43 | 0.009* |
Defocus (Z0 2; μm) | −0.87 ± 0.49 | −0.79 ± 0.72 | −0.82 ± 0.25 | −0.99 ± 0.10 | 0.820 |
Vertical astigmatism (Z2 2; μm) | −0.59 ± 0.98 | −1.55 ± 1.28 | −0.48 ± 0.69 | −0.25 ± 0.62 | 0.001* |
3rd order aberration (μm) | 0.64 ± 0.34 | 0.85 ± 0.68 | 0.55 ± 0.17 | 0.62 ± 0.43 | 0.129 |
Vertical trefoil (Z−3 3; μm) | −0.14 ± 0.37 | −0.28 ± 0.54 | −0.16 ± 0.21 | −0.31 ± 0.50 | 0.470 |
Vertical Coma (Z−1 3; μm) | 0.48 ± 3.84 | 0.23 ± 0.41 | −0.02 ± 0.31 | 0.18 ± 0.30 | 0.939 |
Horizontal coma (Z1 3; μm) | −0.04 ± 0.33 | −0.025 ± 0.29 | −0.13 ± 0.31 | 0.13 ± 0.15 | 0.398 |
Oblique trefoil (Z3 3; μm) | −0.01 ± 0.35 | −0.16 ± 0.72 | −0.01 ± 0.28 | 0.14 ± 0.30 | 0.332 |
4th order aberration (μm) | 0.40 ± 0.30 | 0.44 ± 0.21 | 0.39 ± 0.40 | 0.30 ± 0.27 | 0.802 |
Oblique quadrefoil (Z−4 4; μm) | 0.00 ± 0.07 | 0.03 ± 0.14 | 0.02 ± 0.05 | −0.02 ± 0.03 | 0.422 |
Oblique secondary astigmatism (Z−2 4; μm) | 0.01 ± 0.11 | −0.02 ± 0.16 | −0.00 ± 0.11 | 0.03 ± 0.15 | 0.618 |
Primary spherical (Z0 4; μm) | 0.16 ± 0.30 | 0.10 ± 0.23 | 0.29 ± 0.43 | 0.11 ± 0.09 | 0.243 |
Vetical secondary astigmatism (Z2 4; μm) | 0.08 ± 0.18 | 0.10 ± 0.21 | −0.01 ± 0.16 | 0.02 ± 0.06 | 0.230 |
Vertical quadrefoil (Z4 4; μm) | −0.12 ± 0.24 | −0.13 ± 0.25 | −0.07 ± 0.11 | −0.15 ± 0.33 | 0.876 |