1 points
Abnormal jumpy eye movements that may appear after brain stem or inner ear damage are called

Nystagmus

Explanation:

Nystagmus describes repetitive involuntary eye movements that have a variety of causes, including brain injury, inner ear damage, stroke, substance abuse and metabolic disorders.

Nystagmus can also be congenital, meaning they are present from birth. Early onset nystagmus is much more common than nystagmus acquired in later life. In general, nystagmus is relatively common.

Nystagmus causes eye movements in both horizontal and vertical directions, and is linked with poor vision and depth perception, and can cause dizziness and disorientation.