Presentation on theme: "The lantern-tests may be retaken after 6 months."— Presentation transcript:
1The lantern-tests may be retaken after 6 months. JAR-FCL SECTION 1Appendix 14 to Subparts B and CColour perception(See JAR–FCL and 3.345)1 The Ishihara test (24 plate version) is tobe considered passed if the first 15 platesare identified without error, without uncertaintyor hesitation (less than 3 seconds per plate).These plates shall be presented randomly.For lighting conditions see the JAA Manual ofCivil Aviation Medicine.2 Those failing the Ishihara test shall beexamined either by:(a) Anomaloscopy (Nagel or equivalent). This testis considered passed if the colour matchIs trichromatic and the matching range is 4 scaleunits or less, or by(b) Lantern testing. This test is considered passedif the applicant passes without error a test withlanterns acceptable to the AMS such asHolmes Wright, Beynes, or Spectrolux.[Amdt. 3, ]Amendment AppendicesOPHTHALMOLOGY (Manual of Civil Aviation Medicine)[c) Beyne´s protocolAmbient lighting: DarknessAdaptation period: Three minutesVisual correction: Normal distance - (non-tinted)Subject-lantern distance: Five metres (subject is seated); lantern is at eye levelLantern setting: Three minutes of arcExposure time for each light: One secondPermitted response time: Three seconds (from the termination of light exposure)Pre-test instructions:This test is to find out if you can distinguish red, green, white, blue and orange lights.The lights will be shown to you one at a time. You will see red, green, white,orange and blue and no other colours. You will be shown each light for onesecond and will have three seconds to respond. If you take longer thanthree seconds, this will be regarded as a mistake. Any questions? Start now’The lights are not demonstrated prior to the test.Order of presentation of the lights:First and last presentation is blue. Between the two blue presentationsthree white, three green, three red and one orange light are shown, in arandom order i.e. 12 lights are presented.Number of runs: One (two if one mistake is made in the first run)Pass criteria: No mistakes - the subject is passed as ‘colour vision safe’.Two or more mistakes - the subject is failed as ‘colour vision unsafe’.Only one mistake - a second run of 12 lights is permitted. If no mistakes aremade on the second run, the subject is passed as ‘colour vision safe’.The lantern-tests may be retaken after 6 months.