Eye Scans May Offer Early Warning of Dementia Risk
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CITY — April 28, 2025 —
Researchers are investigating the potential of eye scans to provide early warnings of dementia. This innovative approach, focusing on the retina’s intricate blood vessel network, could offer a non-invasive method for assessing the risk of cognitive decline. Studies indicate that changes in the eye, like narrower arterioles and wider venules, could be associated with greater dementia risk [[1]]. Further research may unlock the power of the eye in early dementia detection.
Eye Scans May offer Early Warning of Dementia Risk
April 28, 2025
A Window too the Brain: Examining the Retina for Dementia Clues
Researchers at the University of Otago in New Zealand are exploring a novel approach to dementia detection, focusing on the intricate network of blood vessels in the retina. This non-invasive method analyzes the microvascular system at the back of the eye to identify early changes associated wiht an increased risk of dementia [[2]].
Did You Know?
The retina is directly connected to the brain, making it a unique and accessible site for observing neurological changes.
Retinal Changes Linked to Cognitive Decline
While the method is not yet ready for clinical application, a growing body of research suggests that the eye provides valuable insights into overall health.The otago team’s work, published in the Journal of Alzheimer’s Disease, is based on eye scan data from 938 men and women around 45 years old.
The study compared the thickness of the retinal nerve fiber layer with measures of cognitive decline, with a particular focus on the fibers that transmit visual information to the brain. The health of retinal microvasculature appears to be a strong predictor of dementia risk [[1]].
Pro Tip
regular eye exams can do more than just check your vision. They can also help monitor your overall health.
The Retina as a Biomarker
According to Dr. Ashleigh Barrett-Young, a researcher at the University of Otago’s Department of Psychology, the retina’s connection to the brain makes it a promising area for inquiry.
we looked at the retina of the eye, which is directly connected to the brain. Many of the disease processes associated with Alzheimer’s are problably reflected in the retina, making it a suitable biomarker for identifying people who run the risk of developing dementia.
Dr.Ashleigh Barrett-Young, University of Otago
Other research supports this, noting significant alterations in retinal thickness and electrical activity in Alzheimer’s patients [[3]].
AI and the Future of Dementia Detection
The potential for AI-based analysis of eye scans could revolutionize early dementia detection, offering a non-invasive and accessible screening option [[2]].This approach could provide valuable time for early intervention and management of the disease.
Frequently Asked Questions
- Can an eye exam detect dementia?
- Research suggests that changes in the retina may indicate an increased risk of dementia, but it is not yet a definitive diagnostic tool.
- What part of the eye is examined?
- Researchers focus on the microvascular network and nerve fiber layer of the retina.
- Is this method currently used in clinics?
- No, the method is still under investigation and not yet ready for clinical use.
