Could an eye exam help you diagnose Alzheimer's disease?

Emerging research about Alzheimer's disease suggests that an eye exam could one day help doctors detect the disease in the brain and that traumatic brain injuries may predispose people to developing dementia.

Elizabeth Cohen, CNN Senior Medical Correspondent, talks with Kiran Chetry and Ali Velshi on American Morning today to discuss the results of these preliminary studies, which offer new insight into the early signs and possible causes of Alzheimers.