Touchscreens and visual impairment

Several years ago there was much talk in the accessibility area about Braille displays. But today flat touchscreens are everywhere, in smart phones, pads and music players. How does a visually impaired person use a touchscreen interface?

At first I thought a touchscreen-dominated device such as the iPhone would be a disaster for the visually impaired, but it turned out to be the other way around. The iPhone Accessibility provides functions like VoiceOver, Siri and Dictation.

For instance, read How the Blind Are Reinventing the iPhone and have a look at this video how a blind man uses Instagram on iPhone: