Facebook has launched new tools powered by its facial recognition tech -- the same one that suggests friends to tag in photos. To start with, it has beefed up the alternative text feature it rolled out last year, which describes a photo's contents for people using a screen reader. For instance, the original version of the tool would describe a friend's photo with the words "may contain: tree, sky, sea." The enhanced version will include those and the names of people who could be in the photo even if they aren't tagged. Facebook's facial recognition can be pretty hit and miss, but the names can give visually impaired users a fuller view of the picture.