Image by jellywatson via Flickr After much hope and controversy, for the first time stem cells have proven to have the ability to cure a disease. The news comes from a study on age-related macular degeneration (AMD) of the retina , the most common cause of blindness in individuals over the age of 50. The Sunday Times reports that the treatment was developed by a group of British researchers, who say that in the next six to seven years the treatment will become a routine opera