Fig. 6: Example of complete retinal pigment epithelial and outer retinal atrophy (cRORA) as seen on optical coherence tomography.

Complete retinal pigment epithelial (RPE) and outer retinal atrophy (cRORA) is defined on optical coherence tomography as a region of hypertension of at least 250 m in diameter; a zone of attenuation or disruption of the RPE of at least 250 m in diameter; evidence of overlying photoreceptor degeneration; the absence of scrolled RPE or other signs of an RPE tear (Sadda et al., 2018).