Table 2.

Peripapillary retinal volume measurements for normal and primary open angle glaucoma patients, using 3 circular grids of different diameters.

	Normal Mean±SD (mm³)	POAG Mean±SD (mm³)	Early POAG Mean±SD (mm³)
OCA1
Superior	0.349±0.046	0.284±0.038^*	0.305±0.032^*
Temporal	0.302±0.029	0.260±0.033^*	0.272±0.033^*
Inferior	0.345±0.028	0.272±0.031^*	0.287±0.023^*
Nasal	0.296±0.028	0.265±0.028^*	0.279±0.020^†

OCA2
Superior	0.472±0.061	0.395±0.043^*	0.417±0.040^*
Temporal	0.417±0.036	0.371±0.036^*	0.383±0.037^*
Inferior	0.465±0.037	0.381±0.037^*	0.397±0.030^*
Nasal	0.408±0.034	0.373±0.036^*	0.385±0.028^†

OCA3
Superior	1.567±0.124	1.397±0.101^*	1.431±0.101^*
Temporal	1.532±0.153	1.411±0.130^*	1.451±0.146^§
Inferior	1.541±0.114	1.351±0.104^*	1.385±0.093^*
Nasal	1.510±0.158	1.395±0.151^*	1.404±0.129^†

SD: standard deviation, POAG: primary open angle glaucoma, OCA1: outer circumpapillary annulus of circular grid 1, OCA2: outer circumpapillary annulus of circular grid 2, OCA3: outer circumpapillary annulus of circular grid 3.

p value comparison to normal < 0.0001;

^†

p value value comparison to normal < 0.01;

^§

p value value comparison to normal < 0.05