Definition
A human-factors phenomenon in which a person fails to perceive a clearly visible object or event because their attention is fully occupied elsewhere. The eyes see it, but the brain does not register it.
Plain English
When you are concentrating hard on one thing, you can completely miss something else that is right in front of you, even though you are looking straight at it.
Context Anchor
Seen in aviation human factors, especially in traffic scanning, checklist use, cockpit workload, and accident discussions.
Derivation
From 'inattention' (not paying attention to) and 'blindness' (failure to see). The term highlights that the cause is attention, not vision -- the eyes work fine; the mind is simply elsewhere.
Why Pilots Care
It contributes to missed traffic, runway incursions, and other hazards when a pilot's attention is narrowly focused during high-workload phases of flight.
Analogy
It is like looking for a street sign while driving and not noticing a person waving from the sidewalk. The person was visible, but your attention was on a different task.
Grounding Statement
During a high-workload moment, a pilot may be looking outside and still fail to notice another aircraft because their attention is absorbed by navigation, radio work, or a cockpit problem.
Intuition Check
Inattentional blindness does not mean the pilot is careless or physically blind. It means attention was focused somewhere else, so the brain did not register something that was visible.
Example Sentence 1
The instructor warned that inattentional blindness is why pilots focused on programming the GPS sometimes miss traffic crossing directly in front of them.
Example Sentence 2
Inattentional blindness can occur during a busy traffic pattern when the pilot concentrates on airspeed and forgets to scan for other airplanes.