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Involuntary oscillatory movement of the eyeballs.



an involuntary, rapid rhythmic oscillation of the eyeballs. The bilateral form of nystagmus is much more common than the unilateral form. Nystagmus can be lateral, rotatory, vertical, or diagonal, depending on the direction of the oscillations of the eyeball. The condition need not be pathological. For example, rotatory nystagmus can be induced in healthy persons who are revolving in a swivel chair, optokinetic nystagmus can result from fixing the eyes on moving objects, and caloric nystagmus can result when cold or warm water is poured into the ear.

Nystagmus is pathological when it results from a morbid condition in the vestibulocochlear nerve, in the vestibular nuclei of the brainstem, or in the labyrinth of the vestibular apparatus. Nystagmus can also result from a morbid process in the cerebellum, an inflammation of the inner ear, cerebrocranial traumas, infections and toxicoses of the brain, or neoplasms in the brain. In rarer cases, nystagmus is caused by eye diseases. Miner’s nystagmus is an occupational disease in miners who work with a pick under poorly illuminated and poorly ventilated conditions. Because these workers are constantly looking up or to the side, certain eye muscles become strained.

Nystagmus is treated by eliminating the underlying cause. In cases of miner’s nystagmus, the worker is transferred to jobs above the ground.


Tsimmerman, G. S. Klinicheskaia otonevrologiia. Moscow, 1952.


References in periodicals archive ?
The clinician has to observe any signs of apraxia, ataxia, nystagmus or restricted eye movements.
5% of the entire study group) of dissociated nystagmus (which was always associated with one or more other central signs), 5 cases (3.
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It is a reliable test in the diagnosis of BPPV when a paroxysmal positional nystagmus is produced (Norre 1995).
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102372, 2010 WL 572082 (Ill Sup Ct) (hereinafter McKown II), the Illinois Supreme Court handed both sides a victory with respect to horizontal gaze nystagmus (HGN) test results in DUI prosecutions.
Navigating Nystagmus with Your Doctor, by Edie Ann Glaser, is described by its publisher as the first comprehensive book written for patients with nystagmus and their care givers.
He suffered from severe heart failure, atrial fibrillation, nystagmus, blindness, deafness, with obesity and Type-2 diabetes.
Neurologic abnormalities were frequently identified, especially in great horned owls, and included head tremors (n = 17), ataxia (n = 13), head incoordination (n = 7), torticollis (n = 3), nystagmus (n = 3), and head tilt (n = 3).