Table 2.
Corneal topographic data between chalazion and control group
| Total | Chalazion group | Control group | p-value | |
|---|---|---|---|---|
| N (eyes) | 114 | 44 | 70 | |
| Gender (M:F) | 52:62 | 19:25 | 33:37 | |
| Age (year) | 41.59 ± 14.08 | 39.57 ± 13.83 | 42.86 ± 14.18 | 0.226 |
| CCT (μm) | 547.25 ± 39.90 | 546.91 ± 43.64 | 547.46 ± 37.69 | 0.943 |
| Average keratometry by ARK (D) | 42.96 ± 1.86 | 42.84 ± 2.08 | 43.03 ± 1.72 | 0.603 |
| Astigmatism by ARK (D) | -0.85 ± 0.99 | −0.94 ± 1.44 | −0.79 ± 0.58 | 0.546 |
| Axis by ARK (°) | 104.23 ± 63.36 | 108.63 ± 60.74 | 101.48 ± 65.26 | 0.579 |
| SimK (D) | 42.76 ± 3.49 | 42.43 ± 2.28 | 42.96 ± 4.08 | 0.434 |
| Astigmatism by simK (D) | 1.31 ± 0.96 | 1.53 ± 1.16 | 1.17 ± 0.78 | 0.074 |
| Axis by simK (°) | 84.74 ± 35.24 | 85.16 ± 28.23 | 84.47 ± 39.20 | 0.914 |
| Mean K of posterior surface (D) | −6.28 ± 0.27 | −6.25 ± 0.24 | −6.29 ± 0.28 | 0.514 |
| Astigmatism of posterior surface (D) | −0.44 ± 0.29 | −0.46 ± 0.26 | −0.43 ± 0.32 | 0.691 |
| Total RMS (μm) | 1.81 ± 0.80 | 1.97 ± 1.05 | 1.71 ± 0.59 | 0.127 |
| 2nd order aberration (μm) | 1.55 ± 0.70 | 1.68 ± 0.87 | 1.48 ± 0.55 | 0.184 |
| Oblique astigmatism (Z−2 2; μm) | 0.04 ± 0.49 | 0.18 ± 0.52 | −0.05 ± 0.45 | 0.013* |
| Defocus (Z0 2; μm) | −0.85 ± 0.50 | −0.83 ± 0.53 | −0.87 ± 0.49 | 0.693 |
| Vertical astigmatism (Z2 2; μm) | −0.74 ± 1.06 | −0.98 ± 1.16 | −0.59 ± 0.98 | 0.057 |
| 3rd order aberration (μm) | 0.67 ± 0.42 | 0.71 ± 0.53 | 0.64 ± 0.34 | 0.398 |
| Vertical trefoil (Z−3 3; μm) | −0.18 ± 0.40 | −0.24 ± 0.44 | −0.14 ± 0.37 | 0.216 |
| Vertical Coma (Z−1 3; μm) | 0.34 ± 3.01 | 0.13 ± 0.37 | 0.48 ± 3.84 | 0.555 |
| Horizontal coma (Z1 3; μm) | −0.04 ± 0.31 | −0.04 ± 0.29 | −0.04 ± 0.33 | 0.961 |
| Oblique trefoil (Z3 3; μm) | −0.02 ± 0.44 | −0.06 ± 0.55 | −0.01 ± 0.35 | 0.378 |
| 4th order aberration (μm) | 0.40 ± 0.30 | 0.40 ± 0.30 | 0.40 ± 0.30 | 0.921 |
| Oblique quadrefoil (Z−4 4; μm) | 0.01 ± 0.09 | 0.02 ± 0.10 | 0.00 ± 0.07 | 0.293 |
| Oblique secondary astigmatism (Z−2 4; μm) | 0.01 ± 0.13 | −0.01 ± 0.14 | 0.01 ± 0.11 | 0.333 |
| Primary spherical (Z0 4; μm) | 0.17 ± 0.30 | 0.17 ± 0.32 | 0.16 ± 0.30 | 0.922 |
| Vetical secondary astigmatism (Z2 4; μm) | 0.07 ± 0.18 | 0.05 ± 0.19 | 0.08 ± 0.18 | 0.447 |
| Vertical quadrefoil (Z4 4; μm) | −0.11 ± 0.23 | −0.11 ± 0.22 | −0.12 ± 0.24 | 0.888 |
SimK simulated keratometry, ARK autorefractokeratometry, RMS root mean square, D diopter; *Statistically significant by independent t-test