About CAD

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 being the interpretation of the Precision Approach Path Indicator (PAPI) lights. Using the pass/fail criteria that have been established, 35% of colour deficient pilots will be granted unrestricted class 1 medical certification.

online video demo

Exam at CAA: takes about 15/30 min.
Pass Fail Criteria (measeured in Standard Normal color units):

< 6 SN for deutans
< 12 SN for protans

The UK CAA will, from September 1st 2009, use the Colour Assessment and Diagnosis (CAD) test to assess applicants who fail the Ishihara plate test. Report published by the CAA & FAA

read CAD comments from Arthur Pape


#1 Pedro Ponte 2012-03-21 22:54
Don't forget, this is just another exam.. Its good if it can give unrestricted access to a couple of people, but it's still not enough since it doesn't clarify if you're clear or not for aviation duty! We need to get an non-discriminat ing standard approved under ICAO and this isn't it.
Also this demo doesn't show the difficult parts of the exam, only the parts where the box is pretty clear to see.

Please login to post comments