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The imaging process, known as optical coherence tomography angiography (OCTA), has been used in recent research to draw a connection between the eye and Alzheimer’s, allowing physicians to see the smallest veins in the back of the eye, such as red blood cells moving through the retina. Researchers believe that because the retina is connected to the brain through the optic nerve, the deterioration in the retina and its blood vessels could mirror changes occurring in blood vessels and structures of the brain.
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