Ishihara Colour Vision Test Book for Color Deficiency 24 Plates with User Manual

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Ishihara Colour Vision Test Book for Color Deficiency 24 Plates with User ManualDescription Package Dimensions 7.95 x 6.02 x 1.22 inches; 14.07 ounces Manufacturer Pal Surgical And Medical

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, but the existence of a deficiency is usually clear after a few plates. There is also the smaller test consisting only 14, 24 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 green
• Diagnostic plates: intended to determine the type of color vision defect
• Ishihara Test Chart Books for Color Deficiency 24 Plates with usar manual

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