Acquired nystagmus
It may be acquired from:
Diseases. Some of the diseases that present nystagmus as a pathological sign:
Aniridia
Benign paroxysmal positional vertigo [20]
Brain tumors (medulloblastoma, astrocytoma, or other tumors in the posterior fossa.)
Head trauma
Lateral medullary syndrome
Ménière's disease and other balance disorders
Multiple sclerosis
Optic nerve hypoplasia
Pelizaeus–Merzbacher disease
Superior canal dehiscence syndrome
Stroke (the most common cause in older people)
Tullio phenomenon
Wernicke–Korsakoff syndrome
Whipple's disease