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Eye and smell tests may reveal early dementia signs

Simple eye and smell tests could be used to spot dementia years before people experience memory symptoms, research suggests.

Researchers at Moorfields eye hospital and the UCL Institute of Ophthalmology found a link between poor cognitive ability – a “clear warning sign” of the early stages of Alzheimer’s – and the thickness of people’s retinal nerves.

In a trial of more than 33,000 participants who were tested on memory, reaction time and reasoning, eye scans showed the nerve fibre layer was significantly thinner among those who performed poorly on cognitive tests.

Read more on the Guardian website.