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

Claude Calames
essay is excellent:

Calame, Claude (1996). Vision, Blindness, and Mask: The
Radicalization of the Emotions in in M. S. Silk,  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
plays language and actions. He also discusses the blind mask, which was to have been worn by the
actor portraying(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.