A new eye scanner that detects autism could revolutionise how the condition is diagnosed.

Flinders University has unveiled the hand-held scanning device that can detect subtle electrical signals in the retina that are a key sign of autism.

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It is expected that the identification of these biomarkers will allow children to be diagnosed earlier, prompting earlier intervention and increased family support.

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The university says there are plans to now expand the diagnostic tool to toddlers and infants.