Researchers developed a test to check the retina for signs of Alzheimer 's . `` When people start to have cognitive changes , these movements become more erratic , and slower , '' she explains . Trial is looking at whether this test can help people before symptoms begin . 1 in 8 people who are 65 and older have Alzheimer 's disease .
Researchers developed a test to check the retina for signs of Alzheimer 's . Trial is looking at whether this test can help people before symptoms begin . 1 in 8 people who are 65 and older have Alzheimer 's disease .