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Table 2 Comparisons of ONH parameters in different astigmatism groups ( x ¯ ± s )

From: The influence of corneal astigmatism on retinal nerve fiber layer thickness and optic nerve head parameter measurements by spectral-domain optical coherence tomography

 

Normal astigmatism group

High corneal astigmatism group

P *

Disc area

1.70 (0.32)

1.95 (0.58)

0.030

Rim area

1.25 (0.30)

1.44 (0.34)

0.019

Vertical C/D ratio

0.44 (0.13)

0.41 (0.18)

0.423

Average C/D ratio

0.48 (0.13)

0.44 (0.16)

0.374

Cup volume

0.096 (0.09)

0.097 (0.10)

0.970

  1. *Independent t-test, ONH indicates optic nerve head, C/D indicates ratio cup-to-disk.