Figure 1
From: Retinal vascular biomarkers for early detection and monitoring of Alzheimer’s disease
Retinal zones utilized for retinal vascular analysis. Zone A is defined as the region from 0 to 0.5 disc diameters away from the disc margin, zone B is defined as the region from 0.5 to 1.0 disc diameters away from the disc margin and zone C is defined as the region from 0.5 to 2.0 disc diameters away from the disc margin. Retinal photograph from a healthy individual.
