nystagmus

Noun
  1. Involuntary movements of the eyeballs;
    Its presence or absence is used to diagnose a variety of neurological and visual disorders (synset 100338431)
    is a type of: eye movement - the movement of the eyes
    subtypes:
    • 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

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