Table 2. Corneal characteristics of the high-myopia and control groups.
| High myopia | Control | P value | ||
|---|---|---|---|---|
| KmF (D) | Mean±SD | 43.18±1.83 | 43.82±1.5 | 0.001# |
| KmB (D) | Mean±SD | -6.32±0.27 | -6.44±0.26 | 0.000# |
| CCT (mm) | Mean±SD | 542.22±33.66 | 544.66±31.03 | 0.505# |
| Astig. C (D) | Mean±SD | 1.06±0.70 | 0.89±0.67 | 0.022# |
| Range | 0.1, 4.2 | 0.1, 4.9 | ||
| Astig. F (D) | Mean±SD | 0.99±0.67 | 0.84±0.68 | 0.044# |
| Range | 0.1, 4.4 | 0, 5.3 | ||
| Astig. B (D) | Mean±SD | -0.29±0.17 | -0.28±0.16 | 0.627# |
| Range | 0, -0.9 | 0, -1.1 | ||
| Diff. (D) | Mean±SD | 0.07±0.34 | 0.05±0.31 | 0.498# |
| Range | -0.9, 1.5 | -0.7, 1.1 | ||
| Astig. type | WTR (C) | 66 | 64 | 0.846## |
| ATR (C) | 70 | 59 | ||
| Obl. (C) | 31 | 27 | ||
| WTR (F) | 80 | 87 | 0.199## | |
| ATR (F) | 54 | 39 | ||
| Obl. (F) | 33 | 24 | ||
| No astig. (B) | 5 | 0 | 0.177### | |
| WTR (B) | 10 | 12 | ||
| ATR (B) | 146 | 132 | ||
| Obl. (B) | 6 | 6 |
Km = mean keratometry; CCT = central corneal thickness; Astig. = astigmatism value; Diff. = difference, Astig. C–Astig. F; Astig. type = astigmatism type; WTR = with the rule; ATR = against the rule; Obl. = oblique; No astig. = no astigmatism; D = diopters; C = total cornea; F = anterior corneal surface; B = posterior corneal surface; SD = standard deviation.
#t-test
##Pearson’s χ2 test
###Fisher’s exact test