nystagmus

2 definitions found

nystagmus - Collaborative International Dictionary of English v.0.48 :

  Nystagmus \Nys*tag"mus\, n. [NL., fr. Gr. ? drowsiness, fr. ? to
     nod in sleep, to slumber.] (Med.)
     A rapid involuntary oscillation of the eyeballs.
     [1913 Webster]

nystagmus - WordNet (r) 2.1 (2005) :

  nystagmus
      n 1: involuntary movements of the eyeballs; its presence or
           absence is used to diagnose a variety of neurological and
           visual disorders