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Ishihara plates for color blindness
a test for red-green color deficiencies that consists of a number of colored plates, called Ishihara plates, each of which contain a circle of dots appearing randomized in color and size. Within the pattern are dots which form a number visible to those with normal color vision and invisible, or difficult to see, for those with a red-green color vision defect.

Definition contributed by BGregory about ten months ago.


Task records: 1  

color perception
  • number of plates read correctly by controls with normal color vision minus number of plates read correctly by subject
 

NPicchetti Initial definition retrieved from http://en.wikipedia.org/wiki/Ishihara_color_test
about ten months ago


Revision 2

Definition contributed by BGregory about one year ago:

a test for red-green color deficiencies that consists of a number of colored plates, called Ishihara plates, each of which contain a circle of dots appearing randomized in color and size. Within the pattern are dots which form a number visible to those with normal color vision and invisible, or difficult to see, for those with a red-green color vision defect. (from Wikipedia)

Revision 1

Definition contributed by SAdministrator about two years ago:

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Identification of red-green colour deficiency: sensitivity of the Ishihara and American Optical Company (Hard, Rand and Rittler) pseudo-isochromatic plates to identify slight anomalous trichromatism.
Birch J
Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) (Ophthalmic Physiol Opt)
2010 Sep
Open Abstract | Citation Profile

Efficiency of the Ishihara test for identifying red-green colour deficiency.
Birch J
(Ophthalmic Physiol Opt)
1997 Sep
Open Abstract | Citation Profile




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