Unilateral nystagmus
Central origin
Dizziness:
Nausea & hearing loss
Peripheral origin
Dizziness: Imbalance & oscillopsia
Central origin
Nystagmus that changes in intensity with change in gaze direction
Peripheral origin
Nystagmus can be suppressed by visual fixation
Peripheral orgiin
Light reflex tests…
Parasymp of CN III
Remark: will be spared in CN III ischemia but not nerve compression