Atypical pupillary light reflex in 2–6‐year‐old children with autism spectrum disorders

The purpose of this study was to investigate pupillary light reflex (PLR) in 2–6‐years‐old children with autism spectrum disorders (ASD). A total of 117 medication‐free 2–6‐year‐old boys participated in this study. Sixty participants were diagnosed with ASD (the “ASD group”) and the other 57 were in the control group of typical development (the “TD group”). A questionnaire was completed by the parent/guardian for assessing potential dysfunctions...