Oedipus is told from the third person point of view. There is no narrator that describes what is happening, each of the characters just say there lines and there is no special focus on any of them.

When Teiresias addresses Oedipus he says:

"He shall be proved the brother and the sire,
Of her who bare him son and husband bother,
Co-partner, and assasin of his sire.
Go in and ponder this, and if thou find
That I have missed the mark, henceforthe declare
I have no wit nor skill in prophecy"
(Exuent Teiresias and Oedipus)

This is an example of the third person point of view that is used. No character in specific is focused on, and after Teiresias is done him and Oedipus exit, and the audience is focused instead on the chorus. When the characters speak, there is no reason that they would be concealing information from the audience, and the narrative is reliable.

Because this is a play, the audience sees each of the characters speak, the audience gets to know the characters more than if it were told from the first person point of view. Each of the characters is well-presented, and they are credible and believable, at least from the ancient greek perspective. The authour wants the audience to sympathize especially with Oedipus, becuase he is the main character and the play is a tragedy. The author mainly gets the audience to sympathize Oedipus through characterization: he is a noble, benevolent king who cares about his subjects and is trying to accomplish a task given to him by the gods. In addition, other characters such as the supplicants, the chorus, or his subjects, like and respect Oedipus.