Definition
Vision in which both eyes work together to view a single scene, with the brain combining the two slightly different images into one. This combined input provides depth perception and accurate judgment of distance.
Plain English
Seeing with both eyes at the same time so the brain can judge how far away things are.
Context Anchor
Seen in night vision discussions, especially when learning how pilots judge distance and depth in low light.
Derivation
From Latin 'bini' meaning 'two at a time' and 'oculus' meaning 'eye'. The word literally means 'two-eyed', which is exactly what it describes — using both eyes together.
Why Pilots Care
Accurate depth perception during night landings and obstacle avoidance depends on binocular vision, which weakens when light is low or when one eye dominates.
Intuition Check
Binocular vision does not mean looking through binoculars. Here, it means using your two eyes together to judge distance.
Example Sentence 1
Strong binocular vision helps the pilot judge the flare height during landing.
Example Sentence 2
Fatigue or uneven lighting can weaken binocular vision and make distances harder to judge on approach.