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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.