MED.B.075 Colour vision
(a) Applicants shall be required to demonstrate the ability to perceive readily the colours that are necessary for the safe performance of duties.
(b) Examination
1) Applicants shall pass the Ishihara test for the initial issue of a medical certificate.
2) Applicants who fail to pass in the Ishihara test shall undergo GCAA approved
advanced colour perception testing to establish whether they are colour safe.
(c) In the case of Class 1 medical certificates, applicants shall have normal perception of colours or be colour safe. Applicants who fail further colour perception testing shall be
assessed as unfit. Applicants for a Class 1 medical certificate shall be referred to the GCAA. (d) In the case of Class 2 medical certificates, when the applicant does not have satisfactory
perception of colours, his/her flying privileges shall be limited to daytime only.
AMC1 MED B.075 Colour vision (Class 1)
(a) The Ishihara test (24 plate version) is considered passed if all the 24 plates, presented in a random order, are identified without error.
(b) Those failing the Ishihara test should be examined by advanced colour vision testing approved by the GCAA (CAD).
Previously "Lantern test" has been accepted FWIW