Eye tests could hold the key to predicting dementia

Measuring the speed of pupil dilation be way of assessing Alzheimer’s risk

THE eyes could be a window into your risk of dementia. University of California researchers who asked people to memorise lists of numbers found the pupils enlarged more in those with slight memory problems than in the others.

A tiny part of the brain called the locus coeruleus is the first to be clogged by tau, a protein that is a hallmark of Alzheimer's disease and is also key to pupil size.

Measuring the speed of pupil dilation could prove to be a simple and inexpensive way of spotting people at risk of Alzheimer's, reports the journal Neurobiology of Aging.

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