. Author manuscript; available in PMC: 2007 Sep 24.

Published in final edited form as: Invest Ophthalmol Vis Sci. 2004 Jun;45(6):1716–1724. doi: 10.1167/iovs.03-0514

Table 5.

Mean ONH parameters for Standard- and High-Density Scanning after Dilation.

ONH Parameters	Standard-Density Fast Acquisition	High-Density Slow Acquisition
hirw (mm³)	1.77 ± 0.28	1.72 ± 0.32
vira (mm²)	0.55 ± 0.39	0.50 ± 0.36
da (mm²)	2.19 ± 0.35	2.12 ± 0.36
ca (mm²)	0.70 ± 0.57	0.61 ± 0.51
ra (mm²)	1.49 ± 0.65	1.52 ± 0.58
cdr	0.33 ± 0.26	0.29 ± 0.22
cdh	0.55 ± 0.20	0.52 ± 0.19
cdv	0.51 ± 0.21	0.48 ± 0.19
cat	0.98 ± 0.84	1.02 ± 0.60
cvt	0.12 ± 0.14	0.12 ± 0.11

The parameters are horizontal integrated rim width (area) defined as hirw, vertical integrated rim area (volume) as vira, disc area as da, cup area as ca, rim area as ra, cup/disc area ratio as cdr, cup/disc horizontal ratio as cdh, cup/disc vertical ratio as cdv, cup area (topo) as cat, cup volume (topo) as cvt. n = 10.