What action does Oedipus take to punish himself after discovering the truth?

After the discovery of the tragic truth regarding his identity and the fulfillment of the prophecy—that he has killed his father and married his mother—Oedipus takes the drastic measure of blinding himself. This self-inflicted punishment serves multiple purposes: it symbolizes his desire to no longer see the consequences of his actions and the pain he has caused to his family and his city. Oedipus had previously sought knowledge and truth relentlessly, but upon realizing that ignorance might have spared him from such a horrific fate, he chooses self-blindness as a means of coping with his unbearable guilt and shame. This act highlights the themes of sight and blindness prevalent throughout the play, emphasizing the tragic irony of Oedipus’s quest for knowledge leading to his complete downfall.