True about central nystagmus is
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)
Changing direction
Not suppressed by optic fixation
Horizontal or veical
All of the above
Ear