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Updated: Jul 27, 2026
A Method to Quantify Visual Information Processing in Children Using Eye Tracking
Published on: July 9, 2016
Influence of prior and visual information on eye movements in amblyopic children
Coralie Hemptinne1,2, Nicolas Deravet3,4, Jean-Jacques Orban de Xivry5,6
1Institute of Neuroscience, Université catholique de Louvain, Louvain, La-Neuve, Belgium. coralie.hemptinne@uclouvain.be.
Insights
Children
Area of Science:
- Visual neuroscience
- Ophthalmology
- Developmental psychology
Background:
- Amblyopia, or 'lazy eye', affects visual development and can impact eye movement control.
- Understanding how visual information processing differs in amblyopic versus typically developing individuals is crucial.
Purpose of the Study:
- To analyze pursuit eye movements in children and adults with and without amblyopia.
- To assess how prior and visual information influence eye velocity and saccades in these groups.
Main Methods:
- Eye movements were recorded while participants (children and adults, amblyopic and control) pursued a standard or 'noisy' (blurry) target.
- Analysis focused on pursuit onset, gain, velocity, and saccades.
Main Results:
- Control children showed delayed pursuit onset and decreased gain with a blurry target.
- Visual information significantly affected pursuit across all groups, but this effect was modulated by age and amblyopia status.
- The impact of visual information on pursuit was generally greater in adults with clear targets and in children with blurry or amblyopic conditions.
Conclusions:
- Children's visual pursuit systems show distinct developmental trajectories compared to adults.
- Amblyopia and target clarity interact to influence how visual information is used to guide eye movements.
Abstract:
This study analyzed the characteristics of pursuit and assessed the influence of prior and visual information on eye velocity and saccades in amblyopic and control children, in comparison to adults. Eye movements of 41 children (21 amblyopes and 20 controls) were compared to eye movements of 55 adults (18 amblyopes and 37 controls). Participants were asked to pursue a target moving at a constant velocity. The target was either a 'standard' target, with a uniform color intensity, or a 'noisy' target, with blurry edges, to mimic the blurriness of an amblyopic eye. Analysis of pursuit patterns showed that the onset was delayed, and the gain was decreased in control children with a noisy target in comparison to amblyopic or control children with a standard target. Furthermore, a significant effect of prior and visual information on pursuit velocity and saccades was found across all participants. Moreover, the modulation of the effect of visual information on the pursuit velocity by group, that is amblyopes or controls with a standard target, and controls with a noisy target, was more limited in children. In other words, the effect of visual information was higher in control adults with a standard target compared to control children with the same target. However, in the case of a blurry target, either in control participants with a noisy target or in amblyopic participants with a standard target, the effect of visual information was larger in children.
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