Figure 1.

Image analysis of OCT angiography of the parafoveal and peripapillary area. (A) Parafoveal capillary network was acquired through scans within the annular zone of 0.6 mm to 2.5 mm diameter around the foveal centre (between yellow and blue lines), and the superficial capillary layer from 3 µm down below the internal limiting membrane to the outer boundary of the inner plexiform layer (between red and green lines) were analysed. (B) Radial peripapillary capillary network was obtained in scans within a 0.7 mm wide elliptical annular region extending outward from the optic disc boundary (between yellow and blue lines), the vasculature within the internal limiting membrane and the nerve fibre layer were analysed (between red and green lines). OCT, optical coherence tomography.