A new AI technique called Quartz can analyze retinal scans to identify key differences in blood vessel patterns, which may indicate cognitive decline. Researchers at City St George’s University of London used the technology on over 63,000 people aged 40-69 and found that those with reduced width and twisting patterns in their retinal vessels were linked to lower scores in memory, reaction time, and intelligence tests.
The study suggests that changes in blood vessel patterns may be due to reduced blood supply in the brain, which could be an early cause or consequence of dementia. This technique has the potential to pinpoint individuals at risk of dementia in its early stages through routine eye checks.
Alzheimer’s Research UK supports the development of this technology, with Professor Chris Owen stating that it could one day become a “seamlessly embedded” part of daily optician routines. David Thomas, head of policy for Alzheimer’s Research UK, described the prospect as a “gamechanger,” emphasizing the importance of early detection in providing better support and treatment options.
While concerns exist about the availability of treatments for neurodegenerative conditions, researchers believe that this technique could become valuable in pinpointing individuals at risk. However, it is unlikely to be widely available for high street use within the next five years, with Thomas noting that effective treatments may emerge during that time.
Source: https://www.theguardian.com/society/2025/mar/09/high-street-opticians-could-use-ai-to-spot-dementia-risk-with-eye-scan