AMC2 MED.B.075 Colour vision

• ED Decision 2019/002/R found in: Aircrew (1178/2011) Part-FCL Part-MED Part-CC Part-ARA Part-ORA Part-DTO (Aug 2023)

AMC2 MED.B.075 Colour vision ED Decision 2019/002/R (a) Colour vision should be tested on clinical indication at revalidation and renewal examinations. (b) The Ishihara test (24 plate version) is considered passed if the first 15 plates, presented in a random order, are identified without error. (c) Those failing the Ishihara test should be examined either by: (1) anomaloscopy (Nagel or equivalent). This test is considered passed if the colour match is trichromatic and the matching range is 4 scale units or less, or if the anomalous quotient is acceptable; or by (2) lantern testing with a Spectrolux, Beynes or Holmes-Wright lantern. This test is considered passed if the applicant passes without error a test with accepted lanterns. (3) Colour Assessment and Diagnosis (CAD) test. This test is considered passed if the threshold is less than 6 standard normal (SN) units for deutan deficiency, or less than 12 SN units for protan deficiency. A threshold greater than 2 SN units for tritan deficiency indicates an acquired cause which should be investigated. AMC2 MED.B.075 Colour vision ED Decision 2019/002/R (a)     Colour vision should be tested on clinical indication at revalidation and renewal examinations. (b)     The Ishihara test (24 plate version) is considered passed if the first 15 plates, presented in a random order, are identified without error. (c)      Those failing the Ishihara test should be examined either by: (1)     anomaloscopy (Nagel or equivalent). This test is considered passed if the colour match is trichromatic and the matching range is 4 scale units or less, or if the anomalous quotient is acceptable; or by (2)     lantern testing with a Spectrolux, Beynes or Holmes-Wright lantern. This test is considered passed if the applicant passes without error a test with accepted lanterns. (3)     Colour Assessment and Diagnosis (CAD) test. This test is considered passed if the threshold is less than 6 standard normal (SN) units for deutan deficiency, or less than 12 SN units for protan deficiency. A threshold greater than 2 SN units for tritan deficiency indicates an acquired cause which should be investigated. ##### AMC2 MED.B.075 Colour vision *ED Decision 2019/002/R* (a) Colour vision should be tested on clinical indication at revalidation and renewal examinations. (b) The Ishihara test (24 plate version) is considered passed if the first 15 plates, presented in a random order, are identified without error. (c) Those failing the Ishihara test should be examined either by: (1) anomaloscopy (Nagel or equivalent). This test is considered passed if the colour match is trichromatic and the matching range is 4 scale units or less, or if the anomalous quotient is acceptable; or by (2) lantern testing with a Spectrolux, Beynes or Holmes-Wright lantern. This test is considered passed if the applicant passes without error a test with accepted lanterns. (3) Colour Assessment and Diagnosis (CAD) test. This test is considered passed if the threshold is less than 6 standard normal (SN) units for deutan deficiency, or less than 12 SN units for protan deficiency. A threshold greater than 2 SN units for tritan deficiency indicates an acquired cause which should be investigated.