Vision issues may be early sign of posterior cortical atrophy, a rare form of the disease
                                
                                
                                    (Newser) -
                                    Alzheimer's patients typically begin to show signs they have the disease via memory issues, but for some patients, an early warning sign arrives another way. Per the  Washington Post , there's a rare variant of the condition, called  posterior cortical atrophy , in which patients start having vision problems early...