Nerve cells, blood vessels in eye 'talk' to prevent disease

Nerve cells and blood vessels in the eye constantly 'talk' to each other to maintain healthy blood flow and prevent disease, scientists say. The study has implications for treating diseases such as diabetic retinopathy and age-related macular degeneration--the leading causes of vision loss in adults. Since the eye is often a good model for understanding the workings of the brain, the findings also provide clues to major neurological diseases such as Alzheimer's, researchers say.

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