Ishihara test pdf 2025

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Research has shown that scores below twelve indicate color vision deficiency, and twelve or more correct indicate normal color vision, with 97% sensitivity and 100% specificity. The sensitivity of the Ishihara test varies by the number of plates allowed to pass, which can vary by institutional policy.
The full test consists of 38 plates, but the existence of a severe deficiency is usually apparent after only a few plates. There are also Ishihara tests consisting of 10, 14 or 24 test plates, and plates in some versions ask the viewer to trace a line rather than read a number.
This series of plates is designed to provide a test which gives a quick and accurate assessment of color vision deficiency of congenital origin. This is the commonest form of color vision disturbances.
Hidden digit plates of Ishihara color blind test The fourth type of plate design is the hidden-digit plate. Hidden-digit plates are designed so that dichromats, but not normal observers, can see the intended figure. Other plates colors for figure and background are separated by large color differences.
**The current passing score is 12 correct of 14 red/green test plates (not including the demonstration plate). Research has shown that scores below twelve indicate color vision deficiency, and twelve or more correct indicate normal color vision, with 97% sensitivity and 100% specificity.
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0:09 2:15 Until you get to the page where there is no numbers. Like that and then you stop and you can testMoreUntil you get to the page where there is no numbers. Like that and then you stop and you can test the other eye. You score these XI higher out of the number of plates youve tested.
In a plate test, the observer must identify a colored symbol embedded in a background (most pseudoisochromatic plates); identify which of four colors is most similar to a standard color, (City University Test); or identify which circle matches a gray rectangle (Sloan Achromatopsia Test).

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