Corona phenomenon as visual aura symptom in migraine

The visual illusion of a typical corona phenomenon was represented as a vis ual migraine aura symptom in six of 562 Migraine Art pictures, whereas anot her five pictures illustrated atypical variants of the said illusion. The e xtra edges of the corona phenomenon are commonly seen around the perceptual images of objects, but in atypical cases they can similarly surround illus ory images and both elementary and complex hallucinatory images. The corona phenomenon is strongly associated with visual loss and the presence of ele mentary geometric hallucinations.