Comparison of Optical Coherence Tomography Angiography and Laser Speckle Flowgraphy for the Diagnosis of Normal-Tension Glaucoma

Table 3

Correlations between optical coherence tomography angiography parameter, laser speckle flowgraphy parameters, and spectral-domain optical coherence tomography parameters in normal tension-glaucoma patients.

	OCT-A inside disc vessel density		OCT-A peripapillary vessel density		LSFG MBRA		LSFG MBRV		LSFG MBRT		GCC thickness		RNFL thickness
	r		r		r		r		r		r		r
OCT-A whole image vessel density	0.333	0.083	0.904	<0.001	0.374	0.050	0.388	0.041	0.495	0.007	0.710	<0.001	0.725	<0.001
OCT-A inside disc vessel density			0.109	0.581	−0.001	0.994	0.093	0.638	0.186	0.342	0.083	0.675	−0.022	0.911
OCT-A peripapillary vessel density					0.271	0.163	0.265	0.172	0.354	0.065	0.640	<0.001	0.758	<0.001
LSFG MBRA							0.831	<0.001	0.823	<0.001	0.531	0.004	0.573	0.001
LSFG MBRV									0.805	<0.001	0.517	0.005	0.535	0.003
LSFG MBRT											0.591	0.001	0.593	0.001
GCC thickness													0.797	<0.001

r: Spearman’s rank coefficient of correlation. . OCT-A: optical coherence tomography angiography; LSFG: laser speckle flowgraphy; MBR: mean blur rate; MBR_A: mean MBR in all areas; MBR_V: mean MBR in the vessel area; MBR_T: mean MBR in the tissue area; GCC: ganglion cell complex; RNFL: retinal nerve fiber layer.