[ lĭs′tĭngz ]
The principle that when the eye turns from looking at one object and fixes upon another, it revolves about an axis perpendicular to a plane cutting both the former and the present lines of vision.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.