The eyes may have it, an early sign of Parkinson's disease

The eyes may be a window to the brain for people with early Parkinson's disease. People with the disease gradually lose brain cells that produce dopamine, a substance that helps control movement. Now a new study has found that the thinning of the retina, the lining of nerve cells in the back of the eye, is linked to the loss of such brain cells.

from Top Health News -- ScienceDaily https://ift.tt/2MTEsSY