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Related Experiment Video

Updated: Jul 17, 2026

Exploring Infant Sensitivity to Visual Language using Eye Tracking and the Preferential Looking Paradigm

Exploring Infant Sensitivity to Visual Language using Eye Tracking and the Preferential Looking Paradigm

Published on: May 15, 2019

Human infants' accommodation responses to dynamic stimuli.

Grazyna M Tondel¹, T Rowan Candy

¹Indiana University School of Optometry, Bloomington, Indiana 47405, USA.

Investigative Ophthalmology & Visual Science

|January 26, 2007

Summary

Infants aged 8-20 weeks can adjust their eye focus to moving objects, showing dynamic accommodative responses similar to adults by three months. This indicates mature motor control in the infant accommodative system.

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Last Updated: Jul 17, 2026

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Gaze in Action: Head-mounted Eye Tracking of Children's Dynamic Visual Attention During Naturalistic Behavior

Gaze in Action: Head-mounted Eye Tracking of Children's Dynamic Visual Attention During Naturalistic Behavior

Published on: November 14, 2018

Area of Science:

Developmental neuroscience
Ophthalmology
Infant visual development

Background:

Infant visual environments contain moving objects.
Infant accommodative system dynamics are largely unknown.
Accommodation impacts retinal image quality and visual experience.

Purpose of the Study:

To record infants' dynamic accommodative responses to stimuli.
To analyze responses across a range of stimulus velocities.

Main Methods:

Binocular accommodative responses recorded at 25 Hz.
Participants: infants (8-20 weeks) and adults.
Stimulus: clown image moving at various velocities (step, 50, 20, 5 cm/s) between 20-50 cm.

Main Results:

Most infants initiated responses within one second.
Infants discriminated stimulus velocities.
Infants adjusted response velocities and durations appropriately.

Conclusions:

By three postnatal months, infants' accommodative response latencies approach adult levels.
Infant accommodative motor system shows little immaturity compared to the sensory visual system.