of vision is ironic in that the blind Tiresias can see what the seemingly brilliant Oedipus has overlooked, namely the king's crimes of incest and murder. "You are the murderer, you are the unholy defilement of this land(Knox, 23)." Tiresias goes on to say "I say that without knowing it you are living in shameful intimacy!
             with your nearest and dearest. You do not see the evil in which you live (Knox, 25)."
             ...