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I was wondering in colour vision testing with Ishihara, how many plates can you get wrong before the colour vision is classed as abnormal?

April 26, 2017classed colour Ishihara plates Testing vision wondering wrong

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I was wondering in colour vision testing with Ishihara, how many plates can you get wrong before the colour vision is classed as abnormal?

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For the 38 plate edition, 13 or less correct answers constitutes a fail, with 17 or more out of the 21 being a pass. 14 – 16 correct answers means the test is inconclusive and retesting by another method should occur. Remember, there are the abbreviated and concise versions and these will have different pass/fail criteria. The answers given are the opinion of the individual examiner or tutor. We make every effort to ensure that the information that appears on the site is correct and up to date. However, we are not responsible for any errors or omissions or for the results obtained from the use of such information.