Oedipus's swollen foot is constantly addressed as a sign of greatness, or as a sign of both his and Laius's binding to their fates. Laius attempts to avoid his fate by killing his child, yet his child ends up surviving and fulfilling the prophecy. Oedipus's scar also symbolizes his binding to his own fate, where he was not able to escape his fate of killing his own father and marrying his mother.
Sight serves as a major symbol in Oedipus Rex. Oedipus is desperate to clear the mystery behind his identity, yet he is blind to the consequences of gaining this knowledge. He goes so far as to call the judgement of Tiresias, who happens to be physically blind, clouded when he refused to assist Oedipus ("Monster! Thy silence would incense a flint. Would nothing loose thy tongue?). Eventually, the consequences of Oedipus's actions causes him to blind himself
The crossroads also serve as a recurring symbol within Oedipus Rex. Although crossroads usually symbolize the freedom of choice, within Oedipus Rex, it represents the Oedipus's and Laius's lack of choice. Laius died on the crossroads, tying him to his fate of getting killed by his son, and Oedipus killed his father on the crossroads.