The Colour Assessment and Diagnosis (CAD) test is a newly developed test for colour vision deficiency in pilots. The CAD test is completely sensitive and specific for the identification of normal colour vision and the test is able to accurately and repeatably quantify the degree of colour vision loss in individuals with colour vision deficiency. The pass/fail criteria are based on the point at which the degree of deficiency degrades performance in critical piloting tasks, the most critical task

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