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Table 3 Topographic astigmatism in the two groups

From: The effect of pterygium on front and back corneal astigmatism and aberrations in natural-light and low-light conditions

 

Pterygium eye

Control eye

Pa

Front corneal astigmatism (3 mm) (D)

1.67 (0.64, 4.36)

0.82 (0.49, 1.28)

0.002

Back corneal astigmatism (3 mm) (D)

0.30 (0.18, 0.63)

0.34 (0.21, 0.45)

0.287

Front corneal astigmatism (7 mm) (D)

3.26 (1.08, 11.08)

0.68 (0.37, 1.13)

 < 0.001

Back corneal astigmatism (7 mm) (D)

0.77 (0.22, 2.97)

0.19 (0.12, 0.30)

 < 0.001

Sim K astigmatism (D)

1.47 (0.72, 8.70)

0.69 (0.41, 1.18)

 < 0.001

  1. aMann–Whitney U test (median (upper QR, lower OR))