# Commission Regulation (EU) No 1178/2011 of 3 November 2011 laying down technical requirements and administrative procedures related to civil aviation aircrew pursuant to Regulation (EC) No 216/2008 of the European Parliament and of the Council (Text with EEA relevance), Division MED.B.075: Colour vision

Extent: E+W+S+N.I.

(a)Applicants shall be assessed as unfit, where they cannot demonstrate their ability to readily perceive the colours that are necessary for the safe exercise of the privileges of the licence.
(b) Examination and assessment
(1)Applicants shall be subjected to the Ishihara test for the initial issue of a medical certificate. Applicants who pass that test may be assessed as fit.
(2)For a class 1 medical certificate:
(i)Applicants who do not pass the Ishihara test shall be referred to the medical assessor of the CAA and shall undergo further colour perception testing to establish whether they are colour safe.
(ii)Applicants shall be normal trichromats or shall be colour safe.
(iii)Applicants who fail further colour perception testing shall be assessed as unfit.
(3)For a class 2 medical certificate:
(i)Applicants who do not pass the Ishihara test shall undergo further colour perception testing to establish whether they are colour safe.
(ii)Applicants who do not have satisfactory perception of colours shall be limited to exercising the privileges of the applicable licence in daytime only.

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Source: https://www.legislation.gov.uk/eur/2011/1178/annex/IV/division/SUBPART+B/section/2/division/MED.B.075 (the official version)
Page: https://openlegislation.uk/eu-regulation-2011-1178/annex-IV/division-SUBPART+B/section-2/division-MED.B.075
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.