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Ishihara Test Chart Books for Color Deficiency 38 Plates with User Manual and One Eye OCCLUDER
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Ishihara Test Chart Books for Color Deficiency 38 Features
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Classification design: This is used to differentiate between red- and green-blind persons. The vanishing design is used on either side of the plate, one side for deutan defects an the other for protans.
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x Diagnostic plates: intended to determine the type of color vision defect.
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x Color plates encased in specially designed album-type books for ease of handling. Detailed instructions included.
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Individuals with color vision defect should see a different figure from individuals with normal color vision.
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Hidden digit design: Only colorblind people are able to spot the sign. If you have perfect color vision, you won’t be able to see it.
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Number of items: 2
About Ishihara Test Chart Books For Color Deficiency 38
Dr Shinobu Ishihara introduced in 1917—almost 100 years ago—the most well known color blindness test. Each of his tests consists of a set of colored dotted plates, each of them showing either a number or a path. Since then this is the most widely used color vision deficiency test and still used by most optometrists and ophthalmologists all around the world. There are other color blindness tests available, but none of them is as famous as the Ishihara plates. It is also well known, that even people with normal color vision sometimes struggle with this test. But nevertheless this plates are still in use in the absence of any better and still affordable color vision test.
