altitudinal hemianopsia

al·ti·tu·di·nal hemianopsia

(ăl′tĭ-tōōd′n-əl)
n.
Hemianopsia affecting the upper or lower half of the visual field.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.