Nystagmus is rapid, involuntary movements of the eyes which is often unnoticeable to people with the complaint. To others it resembles the eye movements when someone is looking at the scenery from the window of a moving train. Usually it occurs in the horizontal plane but it can also affect the vertical.
Nystagmus is an involuntary rhythmic shaking or wobbling of the eyes.
Nystagmus can be acquired later in life due to neurological dysfunction such as a head injury, multiple sclerosis or brain tumors. Unlike nystagmus acquired from early in life, patients with late onset nystagmus usually notice movement in their vision related to the movement of their eyes. This is called oscillopsia. Oscillopsia causes a person to have vertigo or dizziness related to the new movement they experience in their vision.
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