Two new studies recently presented at the 2016 Alzheimer’s Association International Conference (AAIC) provided new evidence supporting the use of retinal changes as a marker for Alzheimer's.
One study, "Retinal Nerve Fiber Layer Thinning Associated with Poor Cognitive Function Among a Large Cohort," reported a strong association between thinning nerve layers in the retina and poor cognition, suggesting retinal imaging as part of early Alzheimer's testing.
And the second study, "Amyloid as a Biomarker of Alzheimer's Disease in Post-Mortem Retinas in Human and the Canine Model of Alzheimer's Disease," studied the presence of amyloid deposits in the retina of both people with Alzheimer's and canine models of the disease through non-invasive polarization imaging. The results of this study reportedly strengthened their utility as a marker of Alzheimer's and a possibility for pre-symptomatic detection.
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Source: Alzheimer’s Association