Early Macular Angiography among Patients with Glaucoma, Ocular Hypertension, and Normal Subjects

Table 4

Vessel distribution of the four patient groups.

Vessel distribution (mean ± SD)	OAG group	NTG group	OHT group	Control group	value
Total superficial vessel density (%)	41.66 ± 5.18	43.25 ± 5.50	46.39 ± 4.71	48.97 ± 3.12	<0.01^a
Total deep vessel density (%)	46.46 ± 3.92	41.44 ± 9.97	48.19 ± 6.40	50.42 ± 8.11	<0.01^b
Foveal avascular zone (mm^2)	0.37 ± 0.13	0.45 ± 0.21	0.25 ± 0.12	0.27 ± 0.12	<0.01^c
Flow area of the outer retina (mm^2)	0.91 ± 0.31	1.12 ± 0.19	1.19 ± 0.18	1.33 ± 0.28	<0.01^d
Flow area of the choriocapillaris (mm^2)	1.95 ± 0.19	1.64 ± 0.49	1.78 ± 0.12	1.78 ± 0.18	0.05

OAG: open-angle glaucoma, NTG: normal-tension glaucoma, OHT: ocular hypertension, and SD: standard deviation. ^aSignificant difference of both the OAG and NTG groups compared to the control group. ^bSignificant difference between the NTG and control groups. ^cSignificant difference between the NTG and OHT groups. ^dSignificant difference of the OAG group relative to both the OHT and control groups.