Control | Nasal | Middle | Temporal | Whole | p-value | |
---|---|---|---|---|---|---|
n | 70 | 10 | 25 | 4 | 3 | |
Gender (M:F) | 33:37 | 5:5 | 9:16 | 2:2 | 2:1 | |
Age (year) | 42.86 ± 14.18 | 42.20 ± 16.29 | 38.12 ± 13.66 | 43.75 ± 14.48 | 45.67 ± 4.51 | 0.679 |
CCT (μm) | 547.46 ± 37.69 | 550.50 ± 19.60 | 542.16 ± 50.65 | 542.25 ± 32.40 | 552.33 ± 14.05 | 0.952 |
Average keratometry by ARK (D) | 43.03 ± 1.72 | 42.44 ± 1.71 | 42.83 ± 2.35 | 44.79 ± 1.51 | 42.51 ± 0.88 | 0.411 |
Astigmatism by ARK (D) | -0.79 ± 0.58 | −0.93 ± 1.01 | −0.79 ± 58.50 | −2.58 ± 3.19 | −0.75 ± 0.35 | 0.046* |
Axis by ARK (°) | 101.48 ± 65.26 | 108.89 ± 61.53 | 115.00 ± 58.50 | 126.67 ± 70.77 | 105.00 ± 49.50 | 0.851 |
SimK (D) | 42.96 ± 4.08 | 41.96 ± 1.91 | 42.33 ± 2.59 | 43.47 ± 1.62 | 43.86 ± 2.15 | 0.823 |
Astigmatism by simK (D) | 1.17 ± 0.78 | 1.16 ± 1.14 | 1.54 ± 1.13 | 1.61 ± 1.79 | 2.30 ± 0.56 | 0.143 |
Axis by simK (°) | 84.47 ± 39.20 | 80.00 ± 33.72 | 82.92 ± 27.77 | 103.00 ± 29.06 | 92.00 ± 22.54 | 0.843 |
Mean K of posterior surface (D) | −6.29 ± 0.28 | −6.19 ± 0.20 | −6.24 ± 0.24 | −6.40 ± 0.34 | −6.42 ± 0.37 | 0.543 |
Astigmatism of posterior surface (D) | −0.43 ± 0.32 | −0.43 ± 0.13 | −0.45 ± 0.32 | −0.46 ± 0.19 | −0.58 ± 0.13 | 0.942 |
Total RMS (μm) | 1.71 ± 0.59 | 1.64 ± 0.76 | 2.03 ± 1.14 | 2.09 ± 1.48 | 2.37 ± 1.05 | 0.243 |
2nd order aberration (μm) | 1.48 ± 0.55 | 1.35 ± 0.78 | 1.69 ± 0.82 | 1.90 ± 1.53 | 2.14 ± 0.93 | 0.219 |
Oblique astigmatism (Z−2 2; μm) | −0.05 ± 0.45 | 0.06 ± 0.48 | 0.17 ± 0.49 | 0.44 ± 0.82 | 0.58 ± 0.47 | 0.033* |
Defocus (Z0 2; μm) | −0.87 ± 0.49 | −0.75 ± 0.34 | −0.94 ± 0.15 | −1.09 ± 0.06 | 0.22 ± 1.80 | 0.003* |
Vertical astigmatism (Z2 2; μm) | −0.59 ± 0.98 | −0.56 ± 1.11 | −1.00 ± 1.19 | −1.18 ± 1.68 | −1.51 ± 0.54 | 0.269 |
3rd order aberration (μm) | 0.64 ± 0.34 | 0.65 ± 0.36 | 0.75 ± 0.66 | 0.67 ± 0.19 | 0.71 ± 0.30 | 0.877 |
Vertical trefoil (Z−3 3; μm) | −0.14 ± 0.37 | −0.27 ± 0.40 | −0.31 ± 0.47 | −0.01 ± 0.24 | 0.11 ± 0.51 | 0.212 |
Vertical Coma (Z−1 3; μm) | 0.48 ± 3.84 | 0.18 ± 0.24 | 0.16 ± 0.41 | −0.12 ± 0.39 | 0.10 ± 0.46 | 0.986 |
Horizontal coma (Z1 3; μm) | −0.04 ± 0.33 | −0.07 ± 0.26 | −0.05 ± 0.28 | 0.15 ± 0.47 | 0.00 ± 0.24 | 0.820 |
Oblique trefoil (Z3 3; μm) | −0.01 ± 0.35 | −0.12 ± 0.42 | −0.13 ± 0.64 | 0.29 ± 0.19 | 0.10 ± 0.24 | 0.349 |
4th order aberration (μm) | 0.40 ± 0.30 | 0.43 ± 0.20 | 0.38 ± 0.34 | 0.36 ± 0.07 | 0.56 ± 0.50 | 0.885 |
Oblique quadrefoil (Z−4 4; μm) | 0.00 ± 0.07 | 0.03 ± 0.14 | 0.03 ± 0.10 | 0.01 ± 0.01 | −0.05 ± 0.06 | 0.380 |
Oblique secondary astigmatism (Z−2 4; μm) | 0.01 ± 0.11 | −0.03 ± 0.12 | −0.02 ± 0.12 | 0.15 ± 0.12 | −0.14 ± 0.16 | 0.015* |
Primary spherical (Z0 4; μm) | 0.16 ± 0.30 | −0.03 ± 0.12 | −0.02 ± 0.12 | 0.20 ± 0.14 | −0.11 ± 0.50 | 0.590 |
Vetical secondary astigmatism (Z2 4; μm) | 0.08 ± 0.18 | 0.17 ± 0.26 | 0.20 ± 0.34 | −0.03 ± 0.15 | 0.12 ± 0.41 | 0.754 |
Vertical quadrefoil (Z4 4; μm) | −0.12 ± 0.24 | 0.03 ± 0.25 | 0.05 ± 0.12 | 0.01 ± 0.20 | −0.18 ± 0.39 | 0.710 |