Table 3.

Different Types of Acquired Nystagmus

S. No	Types	Cause & Clinical Features
1	Downbeat nystagmus	Lesions of Vestibular cerebellum and underlying medulla
2	Upbeat nystagmus	Lesions of the medulla, the ventral tegmentum, and the anterior vermis of the cerebellum
3	Periodic alternating nystagmus	Cerebellar disease
4	Seesaw nystagmus	Para-sellar lesions of optic nerve and chiasma
5	Gaze evoked nystagmus	Side-effect of drugs, including sedatives, anticonvulsants, and alcohol, as well as cerebellar disease
6	Internuclear Ophthalmoplegia83	Due to lesions of medial longitudinal fasciculus Unilateral - Ischaemia Bilateral - Multiple sclerosis
7	Acquired Pendular Nystagmus	Brainstem and cerebellar diseases, myelin disorders, and drug toxicities