What tests are used to evaluate color vision and depth perception for pilots?

• A. Color vision tests only
• B. Color vision tests (Ishihara plates) and depth perception assessments
• C. Depth perception assessments only
• D. Visual acuity tests

Answer: (B)

Testing both color vision and depth perception is essential because pilots rely on color cues and depth cues in flight. Color vision assessments, like Ishihara plates, check the ability to distinguish colors and detect any deficiencies that could lead to misinterpreting cockpit signals, navigation lights, or color-coded warnings. Depth perception assessments measure stereoacuity, the ability to perceive distance using binocular vision, which is crucial for judging how far away other aircraft, terrain, or runways are and for timing approaches and landings. Visual acuity alone doesn’t capture these risks, so combining color vision and depth perception tests provides a fuller, safer evaluation.