At the end of the novel, does max become blind? does Bigger?

Bigger blind? Physically no, but he does realize at the end of the novel that he has been blind in his inability to see people of the 'white' race as individuals.

As for Max, no, he doesn't become blind either. Max is Bigger's voice, in fact he is a voice for all of those he views as oppressed and unable to rise above the circumstances of their birth, the conditions they've lived in. What would make Max considered to be blind is that even with all that he does from the goodness of his heart, he still can't see Bigger the individual. Like Bigger, his view doesn't moved past the whole group and see the individual. They are very alike in this way.