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Updated: Jun 9, 2026
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An Automated Method for Assessing Visual Acuity in Infants and Toddlers Using an Eye-Tracking System
Published on: March 17, 2023
Spatial resolution of conscious visual perception in infants
Faraz Farzin1, Susan M Rivera, David Whitney
1University of California, Davis, USA. ffarzin@stanford.edu
Psychological Science
|September 7, 2010
Summary
Infant visual crowding, the difficulty seeing peripheral objects amid clutter, was measured. Infants
Area of Science:
- Developmental Psychology
- Cognitive Neuroscience
- Visual Perception
Background:
- Human conscious awareness is limited in the visual periphery.
- This limitation is primarily due to crowding, the difficulty in identifying objects surrounded by other stimuli.
- The impact of crowding on infant visual awareness remains largely unexplored.
Purpose of the Study:
- To investigate the phenomenon of visual crowding in infants aged 6 to 15 months.
- To determine whether infants possess a fine-grained visual perception ('spotlight') or a more diffuse one ('lantern').
- To psychophysically measure the spatial resolution of infant visual perception.
Main Methods:
- An eye-tracking paradigm was employed to measure infant responses.
- Infants (6–15 months) viewed pairs of faces at varying eccentricities.
- The presence or absence of flanking stimuli (crowding) was manipulated, and infants' first saccade to a face was recorded.
Main Results:
- Infants demonstrated the ability to discriminate faces in their peripheral visual field.
- The presence of flankers significantly impaired infants' ability to discriminate faces, confirming crowding effects.
- Infants' effective spatial resolution improved with age, but remained approximately half that of adults.
Conclusions:
- Infants experience visual crowding, similar to adults, affecting their peripheral visual awareness.
- Infant visual perception's spatial resolution develops with age during the first year of life.
- The findings suggest a developing, rather than fully formed, visual processing system in infants.
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