noun Ophthalmology.
any of several conditions in which there is blindness in half of the visual field, involving one or both eyes.
Also, hemianopia [hem-ee-uh-noh-pee-uh] , hemiopia.
Also called hemiscotosis.

1880–85; hemi- + an-1 + -opsia

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World English Dictionary
hemianopia (ˌhɛmɪænˈəʊpɪə)
Also called: hemianopsia loss of vision in either the whole left or the whole right half of the field of vision
[C19: from hemi- + an- + Greek opsis sight]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

hemianopsia hem·i·a·nop·si·a (hěm'ē-ə-nŏp'sē-ə) or hem·i·a·no·pi·a (-nō'pē-ə)
Loss of vision in one half of the visual field of one or both eyes.

hem'i·a·nop'tic (-nŏp'tĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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