Optic Disc Vascularization in Glaucoma: Value of Spectral-Domain Optical Coherence Tomography Angiography

Table 3

OCT angiography measurements. SSI: strength signal index.

OCT angiography measurements	Normal		Glaucoma		value
	Mean	SD	Mean	SD
Threshold	0.095	0.012	0.085	0.012	0.001
SSI	72.3	8.41	61.8	7	<0.0001
Total ONH vessel density	0.547	0.154	0.412	0.117	<0.0001
Temporal disc vessel density	0.472	0.105	0.364	0.15	0.0001
Glaucoma stage	Total ONH vessel density		Temporal disc vessel density
	Mean	SD	Mean	SD
Mild	0.441	0.145	0.404	0.178
Moderate	0.439	0.067	0.414	0.110
Severe	0.365	0.076	0.293	0.096