Table 2 Quantitative changes in optic disc morphology in patients with chON and glaucoma.

From: Longitudinal changes in optic disc cupping from the baseline in chiasmal lesion optic neuropathy and glaucoma

Quantitative parameters

chON

Glaucoma

P*

Disc size ratio†

0.36 ± 0.04

0.37 ± 0.04

0.890

Baseline C/D area ratio

0.30 ± 0.08

0.35 ± 0.07

0.012

Final C/D area ratio

0.34 ± 0.09

0.45 ± 0.07

 < 0.001

Increase in C/D area ratio

0.04 ± 0.04

0.10 ± 0.04

 < 0.001

Minimum residual NRR width (%)

29.7 ± 8.2

7.1 ± 3.9

 < 0.001

  1. C/D cup-to-disc, NRR neuroretinal rim, chon chiasmal lesion optic neuropathy.
  2. *Generalized estimation equation.
  3. †\(\mathrm{Disc\, size\, ratio}=\frac{\frac{\sqrt{(Disc\, area)}}{2\pi }}{(Disc\, to\, fovea\, distance)}.\)
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