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nystagmus

DEFINITIONS OF: nystagmus

1

n involuntary movements of the eyeballs; its presence or absence is used to diagnose a variety of neurological and visual disorders

Types:
physiological nystagmus
small involuntary tremors of the eyeballs; when it is eliminated by stabilizing the image on the retina, visual perception fades rapidly from fatigue of the retinal receptors
rotational nystagmus
nystagmus caused by the body rotating rapidly; large slow movements of the eyeballs are in the direction of rotation
post-rotational nystagmus
nystagmus caused by suddenly stopping the rapid rotation of the body; large slow movements of the eyeballs are in the direction opposite to the direction of rotation
Type of:
eye movement
the movement of the eyes
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