For years Apple has had a Braille Screen Input mode, which allows the user to type messages in 6-dot, 8-dot or contracted Braille. But I’d never witnessed it in use until now. The design of it is quite clever; the screen can be faced away from the user–the sightless don’t need to see it, of course–allowing them to type on the “back” with their fingers, allowing for greater speed.
In this video, a woman named Kristy Viers demonstrates how she composes a Tweet: