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noun Ophthalmology.
  1. any of several conditions in which there is blindness in half of the visual field, involving one or both eyes.
Also hem·i·a·no·pi·a [hem-ee-uh-noh-pee-uh] /ˌhɛm i əˈnoʊ pi ə/, hemiopia.

Origin of hemianopsia

First recorded in 1880–85; hemi- + an-1 + -opsia
Also called hemiscotosis.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
hemianopsia in Medicine


  1. Loss of vision in one half of the visual field of one or both eyes.
Related formshem′i•a•noptic (-nŏptĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.