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

Table 2

Characteristics of vertical, horizontal, and maximum diameters measured by two independent observers.

	1st observer; (min-max)	2nd observer; (min-max)	value
NTG group
Vertical diameter	648.98 ± 123.76; (510–1000)	650.33 ± 118.87; (525–989)
Horizontal diameter	631.50 ± 64.44; (520–840)	630.92 ± 69.89; (541–829)
Maximum diameter	731.45 ± 111.02; (624–1055)	732.23 ± 110.13; (608–1034)
Control group
Vertical diameter	512.02 ± 89.45; (336–706)	513.43 ± 84.23; (353–690)
Horizontal diameter	546.54 ± 86.65; (427–804)	548.68 ± 83.35; (442–799)
Maximum diameter	592.11 ± 95.32; (440–802)	582.45 ± 90.24; (470–819)

-test, = Pearson’s correlation coefficient, SD = standard deviation, and NTG = normal tension glaucoma;