Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A form of colorblindness characterized by defective perception of red and confusion of red with green or bluish green.
from The Century Dictionary.
- noun In physiology and psychophysics, a word introduced by von Kries to designate the form of red-green color-blindness termed by the Helmholtzian school ‘red-blindness.’
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun pathology A form of
color blindness . Involves a defect in distinguishing between red and green.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun dichromacy characterized by lowered sensitivity to long wavelengths of light resulting in an inability to distinguish red and purplish blue
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
[prot(o)– + an– + –opia (from the blindness to red, which is considered the first of the primary colors).]
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Examples
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The regular color blindness tests (Ishikawa plates) test primarily for red-green (protanopia and deuteranopia), and not for tritanopia.
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I dunno .. if you look at the protanopia and deuteranopia pics on the wiki page for
Slashdot: Science 2010
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