[Boeck's disease with unilateral optic nerve involvement].

A rare symptom of Boeck's disease is involvement of the fasciculus opticus. This paper reports on a patient with sarcoidosis who developed cerebral symptoms during the course of the disease; some months later he suffered an acute deterioration of vision in his right eye, with central scotoma but without papilledema. The difficulty of distinguishing this condition from bulbar neuritis in cases of multiple sclerosis is discussed.