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The Ishihara test is a color vision test for detection of red–green color deficiencies. It was named after its designer, Shinobu Ishihara, a professor at the University of Tokyo, who first published his tests in 1917. [2] The test consists of a number of Ishihara plates, which are a type of pseudoisochromatic plate.
An Ishihara test image as seen by subjects with normal color vision and by those with a variety of color deficiencies. A pseudoisochromatic plate (from Greek pseudo, meaning "false", iso, meaning "same" and chromo, meaning "color"), often abbreviated as PIP, is a style of standard exemplified by the Ishihara test, generally used for screening of color vision defects.
The commonly used Ishihara test is used to detect mainly congenital red-green color blindness, but its usefulness is limited in detecting acquired color vision deficiencies. [3] But City University test contains test plates that can be used to detect all types of color vision deficiencies. [ 4 ]
The link was discussed at Talk:Color blindness/Archive 2#please test it with mixed results. The link was reinserted by an IP in this edit in 2008. The link has been around for 8 years. There was no discussion on the Ishihara test talk page. Even if we concede the two editors who added the link are the author, that is not necessarily bad.
Shinobu Ishihara (石原 忍, Ishihara Shinobu, September 25, 1879 – January 3, 1963) was a Japanese ophthalmologist who created the Ishihara color test to detect colour blindness. He was an army surgeon .
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Prior to leaving for Germany, Ishiwara had converted to Nichiren Buddhism.Nichiren taught that '[Japan is] superior to India, China and eighty thousand other countries', and that, though the Degenerate Age has arrived, there is still hope by believing in the Lotus Sutra, and Japan would the land where the teaching of the Lotus Sutra would prevail, whence it would be propagated to the rest of ...
The work alternates between essays written by Ishihara and Morita. The essays were based on various speeches given in the past. In general, Ishihara's essays argue that Japan is a world power to be respected, and that Japanese need to assert themselves more when dealing with the U.S. Morita's essays focus more on the tragic flaws of U.S. companies that will eventually lead to America's decline ...