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The Ishihara test is a color perception 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 color-blindness (Handaya, Tokyo, Hongo Harukicho, 1917).〕 The test consists of a number of colored plates, called Ishihara plates, each of which contains a circle of dots appearing randomized in color and size. Within the pattern are dots which form a number or shape clearly visible to those with normal color vision, and invisible, or difficult to see, to those with a red-green color vision defect, or the other way around. The full test consists of 38 plates, but the existence of a deficiency is usually clear after a few plates. There is also the smaller test consisting only 24 plates.〔http://www.dfisica.ubi.pt/~hgil/p.v.2/Ishihara/Ishihara.24.Plate.TEST.Book.pdf〕 The plates make up several different test designs: *Transformation plates: individuals with color vision defect should see a different figure from individuals with normal color vision. *Vanishing plates: only individuals with normal color vision could recognize the figure. *Hidden digit plates: only individuals with color vision defect could recognize the figure. *Diagnostic plates: intended to determine the type of color vision defect (protanopia or deuteranopia) and the severity of it. ==Gallery== File:Ishihara 1.PNG|Ishihara Plate No. 1 (12) File:Ishihara 11.PNG|Ishihara Plate No. 13 (6) File:Ishihara 19.PNG|Ishihara Plate No. 19 (Nothing (hidden digit plate); Red-Green deficiency sees 2) File:Ishihara 23.PNG|Ishihara Plate No. 23 (42) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ishihara test」の詳細全文を読む スポンサード リンク
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