Table 1.

Metric Descriptions

Heidelberg SP-X1902	Mean	Expected probability of OCTA signal for a pixel in the vasculature slab
	Skeleton	Estimation of the center line of a blood vessel – equivalent to vessel length density
	Sum	Amount of OCTA signal within a vasculature slab—equivalent to vessel density
	Prob	Probability that OCTA signal exists in the vasculature slab
	Binary	Binary classification determined by whether the A-scan in the vasculature slab includes a vessel
	Ves en	Binarized classification, preserving small vessels
MatLab	FD	Mathematical measure describing the complexity of a biological structure
	SFD	Measure of FD when the vessels are represented as a 1-pixel wide central line of the vessel
	VD	Total perfused vasculature in area of binarized measurement
	SVD	Measure of VD when vessels are represented as a 1-pixel wide central line (vessel length density)
ImageJ	FAZ area	Area of foveal avascular zone (mm2)
	FAZ perimeter	Perimeter of foveal avascular zone (mm)
	VD	Total perfused vasculature in area of measurement
Fractalyse	FD	Complexity of vascular branching on binarized images.

Units in brackets. Arbitrary units where no units are given. OCTA, optical coherence tomography angiography; Ves en, vessel enhanced; FD, fractal dimension; SFD; skeletal fractal dimension; VD, vessel density; SVD; skeletal vessel density; FAZ, foveal avascular zone.