Researchers have linked abnormal changes in the tiny blood vessels of the retinas of mice with a common genetic mutation known to increase the risk of dementia.
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The "painless" treatment can be used to help people regain the vital sense.
He was just 53 years old when he died in 2010.
'It was a scary diagnosis to almost get.'
“We were surprised to see the effect only in the Alzheimer’s spectrum and not in other neurodegenerative diseases."
The actor opened up about his diagnosis for the first time in an emotional 'GMA' interview.
'The future we imagined simply vanished.'
'Today' cohost has been absent from show since December.
New research suggests rugby players can return to the field a month after a concussion.