Why do children with autism spectrum disorder have abnormal visual perception?

Area of Science:

• Neuroscience
• Developmental Psychology
• Ophthalmology

Background:

• Autism spectrum disorder (ASD) is characterized by significant social functioning impairments.
• Visual information processing, crucial for social cues, is often abnormal in children with ASD.
• The underlying mechanisms of visual processing deficits and their link to social dysfunction in ASD remain unclear.

Purpose of the Study:

• To investigate the relationship between abnormal visual information transmission and visual cortex development in early life.
• To explore the mechanisms behind visual abnormalities observed in children with ASD.
• To provide insights for future research directions concerning visual symptoms in ASD.

Main Methods:

• Examined the retina-lateral geniculate nucleus-visual cortex pathway's role in visual information transmission.
• Investigated developmental abnormalities in visual cortex surface area and thickness during early life in ASD.
• Assessed the impact of these developmental changes on visual evoked potential (P100) transmission.

Main Results:

• Identified abnormal visual orientation, exploration, and visual-spatial perception in ASD children.
• Observed developmental abnormalities in the visual cortex, specifically rapid surface area expansion with constant thickness.
• Found evidence linking these visual cortex changes to abnormal transmission of the P100 component of visual evoked potentials.

Conclusions:

• Abnormal visual perception in ASD is associated with disrupted visual information transmission.
• Early-life abnormal development of the visual cortex is a potential mechanism underlying these visual deficits.
• Understanding these visual processing alterations may offer avenues for future ASD research and interventions.