In The Book Of Eli Is He Blind. Eli, who was nearly blind, was sitting at the front gate to hear the returning soldiers return was unaware of the event until he asked about all the commotion in the city. In the town, the engineer opens eli’s locked bible, which carnegie discovers is in braille.
So yes in the end he does become blind, probably due to the exposure to harmful rays of the sun(remember its post apocalyptic, so probably the ozone layer has completely been depleted leading to harmful uv rays), since he walks without his sunglasses after being shot by gary oldman. Though this is clearly not the case. Also asked, is denzel supposed to be blind in the book of eli?
According to imdb faq yes he was possibly partially blind.
When he reaches a village ruled by the powerful mobster, carnegie (gary oldman), the man views eli's impressive fighting skills and offers eli a place within his gang. This is also one of the reasons that indicate that eli was not completely blind because if he was, he would not be using any sort of eye protection. In the bible, the high priest eli was blind, and some might say that there are several scenes which may indicate that in the movie eli was blind or at least partially blind: There are several scenes where his eyes can be seen.