Foveal Avascular Zone in Normal Tension Glaucoma Measured by Optical Coherence Tomography Angiography

Table 3

Characteristics of the average value of vertical, horizontal, and maximum diameter, foveal avascular zone area, and vessel density in NTG and control group.

Average between 2 measurements	NTG group; (min-max)	Control group; (min-max)	value
Vertical diameter	649.43 ± 112.55; (517.5–994.5)	512.23 ± 85.90; (344.5–697.0)	<0.001
Horizontal diameter	630.34 ± 63.10; (530.5–834.5)	559.77 ± 83.52; (434.5–801.5)	<0.001
Maximum diameter	731.45 ± 112.96; (616.0–1044.5)	586.83 ± 88.39; (455.5–810.5)	0.001
Foveal avascular zone area	0.412 ± 0.060; (0.295–0.472)	0.292 ± 0.048; (0.178–0.399)	<0.001
Vessel density	39.55 ± 3.81; (35.40–41.90)	46.21 ± 3.36; (43.10–50.80)	<0.001

-test, NTG = normal tension glaucoma,   = mean, and SD = standard deviation.