Ishihara color test

Ishihara color test

The Ishihara Color Test is a test for red-green color deficiencies. It was named after its designer, Dr. Shinobu Ishihara, a professor at the University of Tokyo, who first published his tests in 1917. S. Ishihara, Tests for colour-blindness (Handaya, Tokyo, Hongo Harukicho, 1917).]

The test consists of a number of colored plates containing a circle of dots randomized in color and size. Within the randomized 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. The full test consists of thirty-eight plates, but the existence of a deficiency is usually clear after a few plates. Testing the first 24 plates gives a more accurate diagnosis of the level of severity one's color vision defect may be.

Common plates include a circle of dots in shades of green and light blues with a figure differentiated in shades of brown or a circle of dots in shades of red, orange and yellow with a figure in shades of green; the first testing for protanopia and the second for deuteranopia.

Gallery

ee also

* Color blindness

References

External links

* [http://www.toledo-bend.com/colorblind/Ishihara.html Ishihara color test information]
* [http://www.opticien-lentilles.com/daltonien_beta/new_test_daltonien.php Test of color blindness with the indication of the weaknesses in various colours] , quantifies green red blue deficiency ( ISHIHARA test alternative)


Wikimedia Foundation. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • Color perception test — Intervention Example of an Ishihara color test plate. The numeral 74 should be clearly visible to viewers with normal color vision. Viewers with dichromat or anomalous trichromat may read it as 21 , and viewers with achromat may see nothing …   Wikipedia

  • Color blindness — Colorblind and Colourblind redirect here. For other uses, see Colorblind (disambiguation). Color blindness or color deficiency Classification and external resources An 1895 illustration of normal vision and various kinds of color blindness …   Wikipedia

  • Ishihara test — /ish ee hahr euh/, Ophthalm. a test for determining color blindness by means of a series of cards each having colored dots that form one pattern to the normal eye and a different pattern to the eye that is color blind. Also, Ishihara s test.… …   Universalium

  • Shinobu Ishihara — nihongo|Shinobu Ishihara |石原 忍| Ishihara Shinobu |extra=September 25, 1879 January 3, 1963 was a Japanese ophthalmologist who created the Ishihara color test to detect colour blindness.Early life and careerShinobu graduated from medicine in 1905… …   Wikipedia

  • Cartas de Ishihara — Ejemplo de una carta de color Ishihara. El número 74 debe ser claramente visible para los individuos con visión normal. Las personas con anomalía de tricromacia pueden leer 21 , y aquellos con visión acromática no observarán nada. Las Cartas de… …   Wikipedia Español

  • Ishihara test — n a widely used test for color blindness that consists of a set of plates covered with colored dots which the test subject views in order to find a number composed of dots of one color which a person with various defects of color vision will… …   Medical dictionary

  • Ishihara-Farbtafel — Das Prinzip der Ishihara Tafeln in animierter Schwarz Weiß Darstellung. Die Ishihara Farbtafeln werden zur Aufdeckung einer Rot Grün Sehschwäche oder einer (sehr viel selteneren) Gelb Blau Sehschwäche verwendet. Entwickelt und später benannt… …   Deutsch Wikipedia

  • Ishihara — Shinobu, Japanese ophthalmologist, 1879–1963. See I. test. * * * Ishi·ha·ra .ish ē här ə adj of, relating to, or used in an Ishihara test <Ishihara plates> <the Ishihara method> Ishi·ha·ra ē shē hä rä Shinobu (1879 1963) Japanese… …   Medical dictionary

  • test — 1. To prove; to try a substance; to determine the chemical nature of a substance by means of reagents. 2. A method of examination, as to determine the presence or absence of a definite disease or of some substance in any of the fluids, tissues,… …   Medical dictionary

  • ishihara test — |ishē|härə noun Usage: usually capitalized I Etymology: after Shinobu Ishihara died 1963 Jap. ophthalmologist who devised it : a widely used test for the detection of color blindness …   Useful english dictionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”