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Updated: Jul 17, 2026
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A Method to Quantify Visual Information Processing in Children Using Eye Tracking
Published on: July 9, 2016
Visual depth perception of a 10-month-old monocular human infant
Science (New York, N.Y.)
|August 17, 1962
Summary
Infants can perceive depth using only one eye. This study shows monocular vision is sufficient for depth discrimination, challenging the idea that two eyes are essential for this ability.
Area of Science:
- Developmental psychology
- Visual perception
Background:
- Depth perception is crucial for navigation and interaction with the environment.
- Traditionally, binocular cues (using two eyes) were considered primary for depth perception.
Purpose of the Study:
- To investigate whether infants can discriminate depth using only monocular visual cues.
- To challenge the prevailing belief in the primacy of binocular cues for depth perception.
Main Methods:
- An infant with monocular vision was tested on a "visual cliff" apparatus.
- The infant's behavior was observed when presented with different depths of patterned surfaces beneath glass.
Main Results:
- The infant successfully crawled over glass with a patterned surface directly beneath it.
- The infant refused to cross glass when the patterned surface was 40 inches below.
Conclusions:
- Monocular vision alone is sufficient for infants to discriminate depth.
- The study disproves the notion that binocular cues are exclusively necessary for depth perception in infants.
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