involuntary movements of the eyeballs; its presence or absence is used to diagnose a variety of neurological and visual disorders
rapid involuntary eye movement, usually lateral
Origin: First attested in 1798. From nystagmus, from νυσταγμός, from νυστάζω.
a rapid involuntary oscillation of the eyeballs
Origin: [NL., fr. Gr. drowsiness, fr. to nod in sleep, to slumber.]
Nystagmus is a condition of involuntary eye movement, acquired in infancy or later in life, that may result in reduced or limited vision. There are two key forms of nystagmus: pathological and physiological, with variations within each type. Nystagmus may be caused by congenital disorders, acquired or central nervous system disorders, toxicity, pharmaceutical drugs, alcohol, or rotational movement. Previously considered untreatable, in recent years several pharmaceutical drugs have been identified for treatment of nystagmus. Nystagmus is occasionally associated with vertigo.
Chambers 20th Century Dictionary
nis-tag′mus, n. a spasmodic, lateral, oscillatory movement of the eyes, found in miners, &c. [Gr., nystazein, to nap.]
The numerical value of nystagmus in Chaldean Numerology is: 3
The numerical value of nystagmus in Pythagorean Numerology is: 4
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