What are good articles that discuss sight, blindness and knowledge in Oedipus Rex?

Claude Calame’s essay is excellent:

Calame, Claude (1996). “Vision, Blindness, and Mask: The Radicalization of the Emotions in Sophocles’ Oedipus Rex” in M. S. Silk, Tragedy and the Tragic: Greek Theatre and Beyond. Oxford: Oxford University Press, 1996

Calame draws on Aristotle to discuss issues of spectacle and explain the importance of visual knowledge in the play’s language and actions. He also discusses the blind mask, which was to have been worn by the actor portraying...

Claude Calame’s essay is excellent:

Calame, Claude (1996). “Vision, Blindness, and Mask: The Radicalization of the Emotions in Sophocles’ Oedipus Rex” in M. S. Silk, Tragedy and the Tragic: Greek Theatre and Beyond. Oxford: Oxford University Press, 1996

Calame draws on Aristotle to discuss issues of spectacle and explain the importance of visual knowledge in the play’s language and actions. He also discusses the blind mask, which was to have been worn by the actor portraying Oedipus (after the blinding). According to Calame, self-blinding is a "gesture that calls into question the very foundation of tragic 'discourse,' the convention of masked representation as performed at the cult of Dionysus Eleuthereus."

There is another article responding to Calame:

Buxton, Richard (1996). “What can you rely on in Oedipus Rex?”

You could also read:

Thumiger, C. (2013). Vision and Knowledge in Greek Tragedy. Helios, 40(1), 223-245.