Journal of Autism and Developmental Disorders

, Volume 39, Issue 11, pp 1499–1508 | Cite as

Abnormal Transient Pupillary Light Reflex in Individuals with Autism Spectrum Disorders

  • Xiaofei Fan
  • Judith H. Miles
  • Nicole Takahashi
  • Gang Yao
Original Paper

Abstract

Computerized binocular infrared pupillography was used to measure the transient pupillary light reflex (PLR) in both children with autism spectrum disorders (ASDs) and children with typical development. We found that participants with ASDs showed significantly longer PLR latency, smaller constriction amplitude and lower constriction velocity than children with typical development. The PLR latency alone can be used to discriminate the ASD group from the control group with a cross-validated success rate of 89.6%. By adding the constriction amplitude, the percentage of correct classification can be further improved to 92.5%. In addition, the right-lateralization of contraction anisocoria that was observed in participants with typical development was not observed in those with ASDs. Further studies are necessary to understand the origin and implications of these observations. It is anticipated that as potential biomarkers, these pupillary light reflex measurements will advance our understanding of neurodevelopmental differences in the autism brain.

Keywords

Autism Pupillary light reflex Biomarker 

Notes

Acknowledgments

This research was partially supported by a research grant from the Wallace H. Coulter Foundation. The authors thank Dr. Bo Lei for his help with vision exams in a portion of the participants.

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Xiaofei Fan
    • 1
  • Judith H. Miles
    • 2
    • 3
  • Nicole Takahashi
    • 2
    • 3
  • Gang Yao
    • 1
  1. 1.Department of Biological EngineeringUniversity of Missouri-ColumbiaColumbiaUSA
  2. 2.Thompson Center for Autism & Neurodevelopmental DisordersUniversity of Missouri-ColumbiaColumbiaUSA
  3. 3.Department of Child HealthUniversity of Missouri-ColumbiaColumbiaUSA

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