Definition
Visual misperceptions that occur during night approaches and landings, caused by reduced visual cues, atypical runway environments, terrain features, or weather conditions, leading the pilot to misjudge altitude, distance, glidepath, or runway alignment.
Plain English
At night, your eyes have less to work with, so the brain can be tricked about how high you are, how far out you are, or whether you are on the right approach path. These tricks are called night landing illusions.
Context Anchor
Encountered during night approaches and landings, especially at unfamiliar airports, over dark or featureless terrain, or when runway and ground lights create a misleading picture.
Derivation
Illusion comes from a Latin word meaning to deceive or play a trick. That fits the aviation use: the lights and shapes are real, but the picture your brain builds from them can be wrong.
Why Pilots Care
These illusions can lead to improper flare or touchdown, increasing risk of runway excursions or hard landings.
Analogy
Like trying to judge the depth of a pool in dim light—you might think the bottom is farther away than it is.
Grounding Statement
At night, there are fewer visual clues, so a few runway lights can carry too much weight in your judgment of height and distance.
Intuition Check
Do not think of night landing illusions as imaginary sights or hallucinations. The lights and runway are real; the mistake is how your eyes and brain judge height, distance, and position from limited clues.
Example Sentence 1
On the approach into the small mountain field, the instructor warned of night landing illusions caused by the upsloping runway and the dark surrounding terrain.
Example Sentence 2
Night landing illusions often occur when runway lights create a false horizon during the flare.