physiological nystagmus

/F IH0 Z IY0 AH0 L AA1 JH IH0 K AH0 L N AY0 S T AE0 G M AH0 S/
noun
  1. 1

    small involuntary tremors of the eyeballs; when physiological nystagmus is eliminated by stabilizing the image on the retina the perception fades rapidly from fatigue of the retinal receptors

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