Fig. 1

Optical coherence tomography (OCT) and optical coherence tomography angiography (OCTA) of the retina. a En face fundus image showing the optic disc and the macula. b OCT image showing the retinal layers in cross-section passing through the fovea centralis at the location indicated by the bold central arrow in (a). The vitreous (inside of the eye) is at the top of the image and the choroid capillary network (choriocapillaris) is at the bottom. The retinal nerve fibre layer (RNFL) is outlined in red, the inner nuclear layer in blue and the photoreceptor nuclei in yellow, using the manufacturer’s segmentation algorithm. c En face OCTA image of the superficial vascular plexus (SVP) at the level of the retinal ganglion cell nuclei (retinal level indicated by the tip of the connecting arrow). d En face OCTA image of the intermediate capillary plexus (ICP) at the inner border of the inner nuclear layer (retinal level indicated by the connecting arrow tip). e En face OCTA image of the deep capillary plexus (DCP) at the outer border of the inner nuclear layer (retinal level indicated by the connecting arrow tip). f En face OCTA image of the choriocapillaris (retinal level indicated by the connecting arrow tip)