nystagmus

/nəˈstægməs/

Definitions of nystagmus

1. noun

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

   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

   type of:

   eye movement

   the movement of the eyes