Congenital nystagmus and nystagmus alternans

Abstract

A 46-year old man with congenital nystagmus had an alternate nystagmus after a traffic accident.
Nystagmus has a common developing mechanism. The occurrence of pathologic conditions involving oculomotor regulatory mechanisms of the cerebellum and the involvement of the communicating tracts in and around the cerebellum can be presumed.
Congenital nystagmus, head injury, vascular disorders and infections should all be considered when making a diagnosis of nystagmus alternans.