Oedipus Rex reveals the prophecy which caused him to leave Corinth (791-93): "that I was fated to lie with my mother," "and show to daylight an accursed breed" "which men would not endure, and I was doomed" "to be murderer of the father that begot me." The implication of Laius's oracle is ambiguous. One interpretation considers that the presentation of Laius's oracle in this play differs from that found in Aeschylus's Oedipus trilogy produced in 467 BC. Helaine Smith argues: Sophocles had the option of making the oracle to Laius conditional ("if" Laius has a son, that son will kill him) or
Oedipus Rex to anyone. Literal and metaphorical references to eyesight appear throughout "Oedipus Rex". Clear vision serves as a metaphor for insight and knowledge, but the clear-eyed Oedipus is blind to the truth about his origins and inadvertent crimes. The prophet Tiresias, on the other hand, although literally blind, "sees" the truth and relays what is revealed to him. "Though Oedipus' future is predicted by the gods, even after being warned by Tiresias, he "cannot" see the truth or reality beforehand because his excessive pride has blinded his vision…" Only after Oedipus has physically blinded himself does he gain a limited prophetic