Table 2

Absolute fluorescein filling defects and blood flow velocities of the retrobulbar vessels of the patients with normal tension glaucoma (NTG) and control subjects with corresponding p values (unpaired t test)

NTGControl subjects
Mean (SD)Mean (SD)Significance level (p value)
NS = not significant.
OA = ophthalmic artery, CRA = central retinal artery, CRV = central retinal vein, PCA = short posterior ciliary artery, PSV = peak systolic velocity, EDV = end diastolic velocity, RI = resistive index.
Absolute filling defects of the optic nerve head0.16 (0.17)0.01 (0.02)<0.0001
OA PSV (cm/s)29.2 (9.4)36.0 (8.3)<0.01
OA EDV (cm/s)8.1 (3.3)8.1 (3.7)NS
OA RI0.73 (0.06)0.78 (0.07)<0.01
CRA PSV (cm/s)7.2 (1.6)9.8 (2.2)<0.0001
CRA EDV (cm/s)1.8 (0.9)3.2 (0.7)<0.0001
CRA RI0.75 (0.10)0.67 (0.07)<0.01
CRV minimum (cm/s)2.6 (0.4)2.6 (0.4)NS
CRV maximum (cm/s)3.8 (0.9)4.1 (0.6)NS
Temporal PCA PSV (cm/s)7.3 (1.3)8.4 (1.9)<0.05
Temporal PCA EDV (cm/s)2.2 (1.0)3.5 (0.8)<0.0001
Temporal PCA RI0.70 (0.12)0.58 (0.06)<0.0001
Nasal PCA PSV (cm/s)6.8 (1.2)8.5 (1.7)<0.0001
Nasal PCA EDV (cm/s)2.1 (0.8)3.5 (0.6)<0.0001
Nasal PCA RI0.70 (0.10)0.59 (0.05)<0.0001