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Scientists have a test for Alzheimer's disease, which until now could only be diagnosed with certainty after death, according to a study released today and published by Science. Researchers at Brigham and Women's Hospital in Boston and at Harvard say an eyedrop drug called tropicamide causes pupils in the eyes of Alzheimer's patients to dilate approximately four times more readily than in those of people without the brain-debilitating disease. Former President Reagan's revelation last weekend that he's an Alzheimer's victim is expected to focus national attention on the disease. Still, the availability of the new testing procedure means only that patients can plan for the loss of mental ability; there's no known cure yet.Post your opinion on theHealth & Medecinebulletin board.