nystagmus
English Thesaurus
1. involuntary movements of the eyeballs; its presence or absence is used to diagnose a variety of neurological and visual disorders (noun.act)
| hypernym | : | eye movement, |
| definition | : | the movement of the eyes (noun.act) |
| hyponym | : | physiological nystagmus, |
| definition | : | 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 (noun.act) |
| hyponym | : | rotational nystagmus, |
| definition | : | nystagmus caused by the body rotating rapidly; large slow movements of the eyeballs are in the direction of rotation (noun.act) |
| hyponym | : | post-rotational nystagmus, |
| definition | : | 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 (noun.act) |
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