AskDefine | Define nystagmus

Dictionary Definition

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

User Contributed Dictionary



First attested in 1798. From nystagmus from etyl grc νυσταγμός from νυστάζω.


  • /nɪ'stægməs/


  1. rapid involuntary eye movement, usually lateral
    • 1970: For months Travis had seen his solitary figure, shoulders hunched inside the flying jacket, in more and more newsreels, as an extra in war films, and then as a patient in an elegant ophthalmic film on nystagmus — JG Ballard, The Atrocity Exhibition

Extensive Definition

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