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While it has been said that the eyes are a window to the soul, a new study shows they could be a means for understanding diseases of the brain. According to new research, retinal scans can detect key changes in blood vessels that may provide an early sign of Alzheimer's, while offering important insights into how one of the most common Alzheimer's risk genes contributes to the disease.

Sleep disorders are associated with significantly higher rates of health care utilization including more doctors visits and prescriptions, placing an additional $94.9 billion in costs each year to the U.S. Health care system.