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Saccade latencies during a preferential looking task and objective scoring of grating acuity in children with and

Annemiek D Barsingerhorn1,2, F Nienke Boonstra1,3,4, Jeroen Goossens1

  • 1Department of Cognitive Neuroscience, Biophysics Section, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Centre Nijmegen, Nijmegen, The Netherlands.

Acta Ophthalmologica
|February 9, 2019
PubMed

Insights

Eye tracking effectively assessed grating detection in children. Children with visual impairments showed delayed visual responses and lower accuracy compared to normally sighted peers.

Area of Science:

  • Ophthalmology
  • Developmental Neuroscience
  • Human-Computer Interaction

Background:

  • Preferential looking tasks are standard for assessing visual acuity in infants and children.
  • Video-based eye tracking offers objective measurement of visual attention and response latencies.
  • Assessing grating detection in visually impaired children requires reliable and feasible methodologies.

Purpose of the Study:

  • To determine orienting response latencies in children with normal vision and visual impairments during a preferential looking task.
  • To evaluate the feasibility of scoring grating detection using video-based eye tracking in these populations.
  • To compare visual performance and eye movement characteristics between typically developing children and those with visual impairments.

Main Methods:

  • Children (6-12 years) performed a computerized preferential looking test with a remote eye tracker.
  • Stimuli included a 2x2 grid with uniform fields and a target grating at varying spatial frequencies.
  • Three scoring methods (saccade endpoint, gaze duration, combined) assessed grating detection accuracy.

Main Results:

  • The combined scoring method proved most reliable for grating detection.
  • Children with visual impairments exhibited significantly lower detection accuracy across all methods.
  • Saccade latencies were longer in children with visual impairments (62 ± 15 ms) and decreased with age.

Conclusions:

  • Video-based eye tracking provides objective measures for grating detection in clinical populations.
  • This method reveals valuable information on developmental delays in saccade latencies.
  • Eye tracking enhances preferential looking tasks for assessing visual function in children with impairments.
Abstract

Keywords:
case-control studychild developmentorienting responsereaction timesvisual acuity

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