Concussion Alters Dynamic Pupillary Light Responses in Children

Posted on 2020-10-17 - 12:11

To investigate the impact of concussion on pupillary function in children by examining pupillometric parameters and assessing for differences in children reporting photosensitivity.


Retrospective chart review was performed of pediatric patients referred for visual symptoms after concussion from 2017 to 2018 seen in a single academic outpatient clinic. Pupillometry data of 92 patients were included. Outcomes were compared to normative pediatric data from the same institution by 2-sample t tests. The association between photosensitivity and each outcome was assessed by use of linear mixed models with photosensitivity as a fixed effect and random patient effect.


Outcomes of 181 eyes in 92 concussion patients were averaged by patient and compared to normative values in scotopic conditions. Concussion patients had an average age of 13.8 ± 2.64 years. Average constriction velocity (P = .0008), maximum constriction velocity (P = .0012), and average dilation velocity (P = .0034) were faster in concussion patients, whereas 75% recovery times (P = .0027) was increased. Photosensitivity did not significantly affect measured pupillary responses.


Dynamic pupillary responses may be increased in pediatric concussion. Pupillometry may provide insight into the complex pathophysiological changes underlying pediatric concussion.


Hsu, Jerry; Stec, Magdalena; Ranaivo, Hantamalala Ralay; Srdanovic, Nina; Kurup, Sudhi P. (2020): Concussion Alters Dynamic Pupillary Light Responses in Children. SAGE Journals. Collection.
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Journal of Child Neurology


Jerry Hsu
Magdalena Stec
Hantamalala Ralay Ranaivo
Nina Srdanovic
Sudhi P. Kurup
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