Check the listing for details. 38 PLATES ISHIHARA TEST BOOK FOR OPTOMETRY NEW OPHTHALMOLOGY. Condition: New. Listed at 35.00 USD. Ishihara test Book 38 Plates with Occluder:- The 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,Individuals With Color Vision Defect Should See A Different Figure From Individuals With Normal Color Vision.Makes Use Of The Peculiarity That In Red-Green Blindness, Blue And Yellow Appear Remarkably Bright Compared With Red And GreenDiagnostic Plates: Intended To Determine The Type Of Color Vision DefectIshihara Test Chart Books For Color Deficiency 38 Plates With Usar Manual Buyer is responsible for all applicable import duty & taxes within their respective country and are not included in our shipping and handling fees. YOUR FEEDBACK IS IMPORTANT FOR US TO GROW OUR BUSINESS ON EBAY, SO PLEASE DO LEAVE FEEDBACK.