Fig. 8

Differences in corneal astigmatism between the high myopia group and the non-high myopia group. (a) Bar graph showing the frequencies (%) of astigmatism cylinders in 0.50 D steps in the high myopia group (n = 2206) and the non-high myopia group (n = 13429). (b) Line chart comparing the cumulative percentages of eyes in 0.50 D steps in the two groups. (c) Comparisons of three categories according to astigmatism severity in the two groups. (d) The proportions of WTR, ATR, and oblique astigmatism in the two groups. (CA corneal astigmatism, D dioptres; WTR with-the-rule, ATR against-the-rule). P values were determined with the χ2 test.