At the end of The Book of Eli it is revealed that the eponymous bible that Eli used to read (and learn by heart) is actually written in Braille. Yet I'm not sure what further conclusions to draw from this. Was Eli just able to read Braille for some unknown reason or was he actually blind all the time (probably since the apocalypse 30 years ago, which is implied to have blinded many people)?
And if he was really blind, then how could he do all those things he did and appear as a man who can see perfectly? Was he just well-trained or are we supposed to believe that the same "mysterious voice" who sent him on his mission gave him the power to see and sense his environment (and to survive the shot long enough to complete his task)? Or was it only his own believe in his mission that let him accomplish all those things he did (though that would stretch the capabilities of self-confidence a bit far)?