Why are there sp many references to sight in Oedipus Rex?

Sight and blindness

Teiresias holds the key to the link between sight and blindness - for even though he is blind, he can still see and predict the future (if not the present). At the end of the play, moreover, Oedipus blinds himself, because what he has metaphorically seen (i.e. realized) leaves him unable to face his family or his parents in the afterlife). As with the previous theme, sight/blindness operate both literally and metaphorically within the play. Indeed, literal sight is juxtaposed with 'insight' or 'foresight'.

The many words you can use to reference sight are a theme throughout Oedipus Rex from beginning to end. Teresias (the prophet) is blind, but he can can "see" everything about Oedipus' past, present and fututre. In contrast, Oedipus who can see....... sees nothing. He is blind to his fate, evan though he has been bleesed with keen insight and wisdom.

When Oedipus finally realizes the truth, he takes his own eyes. A symbol that he has been blind to the truth. He physically becomes what he's metaphorically been from the beginning. Blind.