Table 1.

Demographics of the normal and primary open angle glaucoma study population

	Normal	POAG	p value*	Early POAG	p value†
Number of eyes	67	89		33
Number of right eyes/left eyes	37/30	51/38	0.871	22/11	0.190
Mean age (years) ± SD	62.6±11.6	66.0±10.6	0.055	67.1±7.9	0.051
Refractive error (D)
Sphere ± SD	0.008±1.41	0.04±1.23	0.878	−0.19±1.01	0.500
Cylinder ± SD	−0.57±0.74	−0.45±0.81	0.371	−0.74±0.57	0.095
Spherical equivalent ± SD	−0.28±1.52	−0.19±1.18	0.678	1.52±1.01	0.828
VF
Mean deviation(dB) ± SD	−1.92±1.99	−11.20±7.92	<0.001	−3.97±1.50	<0.001
Pattern standard deviation(dB) ± SD	1.84±0.70	7.01±3.35	<0.001	4.40±1.77	<0.001

POAG: primary open angle glaucoma, SD: standard deviation, D: diopter, dB: decibel, VF: visual field

^*Normal patients versus all POAG patients

^†Normal patients versus a subset of early POAG patients