True about central nystagmus is: (A) Changing direction, (B) Not suppressed by optic fixation, (C) Horizontal or veical, (D) All of the above
Answer is D. Nystagmus is central when the lesion is in the central neural pathways. It cannot be suppressed by optic fixation. The direction of nystagmus is changing and is non-fatiguable. (Ref: Diseases of EAR, NOSE AND THROAT by PL DHINGRA - 6th Edition)