1. The positioning of the pupil of the eye other than in the center of the iris.
2. Eccentric (deviating from the center) location of the pupil so that it is not in the center of the iris.
3. An abnormal position, or displacement to one side of the center of the iris, of the eye pupil.
4. Displacement of the pupil from its usual central position, usually a developmental condition rather than the result of injury or inflammation.