What reason does Oedipus give for his blindness being a "good thing"?

Oedipus refers to his blindness as a "good thing" because he wants to avoid the pain of seeing his deceased parents. After discovering the truth about his origins and the horrific actions he unknowingly committed, including the murder of his father and the incestuous relationship with his mother, the realization of these facts is overwhelming. Being blind protects him from the visual reminders of his tragedies and allows him to live in a state where he is not confronted directly with the consequences of his actions. This aspect of blindness symbolizes a deeper desire to escape from the reality of his past and the guilt that comes with it. Therefore, the notion of blindness as a "good thing" reflects his psychological struggle and his wish to distance himself from the memories and sights associated with his irreversible fate.