{"id":283,"date":"2019-11-27T05:04:19","date_gmt":"2019-11-27T05:04:19","guid":{"rendered":"https:\/\/eportfolios.capilanou.ca\/dallasmckinnon\/?p=283"},"modified":"2019-11-27T05:05:22","modified_gmt":"2019-11-27T05:05:22","slug":"survey-8-charlestons-and-communists","status":"publish","type":"post","link":"https:\/\/eportfolios.capilanou.ca\/dallasmckinnon\/2019\/11\/27\/survey-8-charlestons-and-communists\/","title":{"rendered":"Survey 8: Charlestons and Communists"},"content":{"rendered":"\n

Shinobu Ishihara and his Colourblind Tests<\/h2>\n\n\n\n

Shinobu Ishihara studied at the Imperial University of Tokyo with a military scholarship. After graduating in 1905, he would join the army as a military physician, but also served as a surgeon. In 1908, he would return to study ophthalmology (The study of eye disorders). The would further his education with the likes of Wolfgang Stock, Karl Theodor Paul Axenfeld, and Carl von Hess. While tending to his patients, he was also conduction \u201cbattlefield ophthalmology\u201d to select distinguished soldiers. <\/p>\n\n\n\n

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Shinobu Ishihara<\/a><\/figcaption><\/figure><\/div>\n\n\n\n

This lead him to screen tests on recruits to detect irregularity in colour vision. Thus, the Ishihara Tests were developed. <\/p>\n\n\n\n

(The first Ishihara Test plates were made in Hiragana in Watercolour)<\/p><\/blockquote>\n\n\n\n

The Ishihara Test, or Pseudoisochromatic plates, were published in 1917 and is the most popular colourblind test still used to this day. The plates consist of different coloured dots, with a symbol made of dots inside them, that are rendered in colours specific to different types of colour vision deficiencies. <\/p>\n\n\n\n

Knowing that our eyes operate on rods, low-light photoreceptors, and cones, day-light and colour photoreceptors, we can categorize colour vision deficiencies. <\/p>\n\n\n\n

(We have 3 types of cones. L-Cones (red), M-Cones (green), and S-Cones (blue))<\/p><\/blockquote>\n\n\n\n