retraction nystagmus

n.
  1. An irregular jerky nystagmus, either horizontal, vertical, or rotatory, with drawing of the eye backward into the orbit when an attempt is made to look one way or the other.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.