There is a good deal in the play about seeing and blindness. What purpose does this serve?

A central
theme of  is the way , or pride, can blind us to our own flaws and
weaknesses. As the play opens,cannot conceive that he is the cause of the plague in Thebes,
whichattributes to the person who murdered Laius having escaped justice. 

Oedipus himself murdered Laius, out of pride, having been offended by him without
knowing who he was, and yet ironically, his pride blinds him to any idea he could be
responsible, even when he is warned he should not look too deeply into the events leading up to
the plague.

When Oedipus realizes he is the murderer and that Laius andwere
his parents, this perception overwhelms him. If pride had blinded him, he now sees too
much,...