A trip to the eye doctor may soon reveal more than just changes in vision. New research shows that tiny changes in the blood vessels of the retina — the light-sensitive layer at the back of the eye — may serve as early warning signs of Alzheimer’s disease, years before memory problems begin.
In mice carrying a common genetic mutation linked to dementia, retinal blood vessels appeared twisted and narrow, suggesting poor blood flow. Researchers say these same patterns are seen in the brains of people at higher risk for cognitive decline. Detecting them early could give doctors a valuable tool for spotting Alzheimer’s long before symptoms appear.
The discovery offers hope that routine eye exams could one day act as a first line of defense against dementia. Experts believe this approach might allow doctors to identify at-risk patients up to 20 years earlier, opening the door to earlier treatment and prevention strategies.
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