IN THIS issue of the ARCHIVES, River et al1 describe 6 patients with an unusual and interesting phenomenon called reversal of vision (RVM). This is a rare transient form of visual metamorphopsia in which patients see things upside down or rotated 180° in the coronal plane. Five of the 6 patients in the study had parietal lobe lesions, 4 had a brainstem lesion, and 5 had an ocular motility disorder. Although these are interesting observations, the brain mechanisms that account for these clinical phenomena have not been entirely elucidated.
Heilman KM, Nadeau SE. What's Up?. Arch Neurol. 1998;55(10):1285-1286. doi:10.1001/archneur.55.10.1285