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Changes in eye can predict changes in brain

A loss of cells in the retina is one of the earliest signs of frontotemporal dementia in people with a genetic risk for the disorder -- even before any changes appear in their behavior -- scientists have found. Although it is located in the eye, the retina is made up of neurons with direct connections to the brain. This means that studying the retina is one of the easiest and most accessible ways to examine and track changes in neurons.

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