What visual illusion is created when an upsloping runway is perceived?

When an upsloping runway is perceived, the visual illusion that is created is the perception of a narrower-than-usual runway. This phenomenon occurs due to the way our brains interpret visual cues. The upsloping surface tends to compress the visual elements of the runway, making it appear more constricted than it actually is. Pilots may instinctively feel that the runway width is reduced because the elevation and angle create a sense of depth and perspective that tricks the eye.

Understanding this optical illusion is crucial for pilots as it can lead to misjudgments during landing and takeoff phases. Recognizing the characteristics of how an upsloping runway might affect perception can help pilots adjust their approach and ensure safer landings despite the visual misjudgment.