This is pretty cool. Film critic Tommy Edison has been blind since birth. In this video, he shows how he takes iPhone photos with Instagram.
The best line is near the halfway mark when he says, "Why I'm holding the phone up to my face like I can look through the thing is beyond me, but here we go."
You can also see all of Edison's Instagram work here.
Edison also has his own website, featuring his film reviews and a healthy collection of videos in which he comments on different aspects of his experiences as a blind person.
And yes, according to Tommy, it's impossible to describe color to a blind person.