{"product_id":"ishihara-colour-vision-test-book-for-color-deficiency-24-plates-with-user-manual","title":"Ishihara Colour Vision Test Book for Color Deficiency 24 Plates with User Manual","description":"\u003cul\u003e\n\u003cli\u003eindividuals with color vision defect should see a different figure from individuals with normal color vision.\u003c\/li\u003e\n\u003cli\u003eMakes use of the peculiarity that in red-green blindness, blue and yellow appear remarkably bright compared with red and green\u003c\/li\u003e\n\u003cli\u003eDiagnostic plates: intended to determine the type of color vision defect\u003c\/li\u003e\n\u003cli\u003eIshihara Test Chart Books for Color Deficiency 24 Plates with usar manual\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThe test consists of a number of colored plates, called Ishihara test 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 14, 24 plates.\u003c\/p\u003e","brand":"PSM","offers":[{"title":"Default Title","offer_id":45448371634223,"sku":"B01N7NFWT2","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0730\/3498\/9615\/files\/81BRfAv49SL._AC_SL1500.jpg?v=1781022422","url":"https:\/\/www.coziecorners.com\/products\/ishihara-colour-vision-test-book-for-color-deficiency-24-plates-with-user-manual","provider":"CozieCorners","version":"1.0","type":"link"}