To what elements of the Oedipus story does Muriel Rukeyser allude in 'Myth'?

It is to Oedipus' defeat of the Sphinx, incest with his mother, self-mutilation and years in exile that "Myth" by Muriel Rukeyser (December 15, 1913 - February 12, 1960) refers.

Specifically, exiled former King Oedipus comes across the Sphinx. Oedipus is described as blind. He mentions his ignorance of his biological mother's identity. He speaks with the Sphinx about his and her way of answering the riddle.