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The UK CAA will, from September 1st 2009, use the Colour Assessment and Diagnosis (CAD) test (http://www.caa.co.uk/caapaper200904) to assess applicants who fail the Ishihara plate test. The CAD test has greater accuracy and reproducibility in comparison with other available testing methods. Moreover, the CAD test pass/fail limits are set so as to only exclude those [...]

Colour Perception Testing of Initial Applicants for UK/JAA Class 1 and 2 medical certificates

The UK CAA will, from September 1st 2009, use the Colour Assessment and Diagnosis (CAD) test (http://www.caa.co.uk/caapaper200904) to assess applicants who fail the Ishihara plate test. The CAD test has greater accuracy and reproducibility in comparison with other available testing methods. [...]