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Table 4 Influence of coma on orientation of refractive astigmatism

From: Assessment of refractive astigmatism and simulated therapeutic refractive surgery strategies in coma-like-aberrations-dominant corneal optics

  Axis of Coma Axis of DA TCL + LA Coma RA
1 94 98 WTR Vertical ATR
2 84 85 WTR Vertical ATR
3 97 92 ATR Vertical ATR↑
4 93 84 ATR Vertical ATR↑
5 119 114 ATR Vertical ATR↑
6 84 82 ATR Vertical ATR↑
7 51 64 WTR Oblique Oblique
8 34 68 WTR Oblique Oblique
9 115 81 WTR Vertical ATR
10 45 55 Oblique Oblique ATR
11 76 106 WTR Vertical WTR↓
  1. DA = discrepant astigmatism; TCA = total corneal astigmatism, LA = lenticular astigmatism, RA = refractive astigmatism, WTR = with the rule, ATR = against the rule
  2. ↑: increased amplitude of astigmatism
  3. ↓: decreased amplitude of astigmatism