What dramatic techniques does Sophocles employ in Oedipus the King?

In his great
, ,employs the dramatic techniques of , symbolism and . In form, he also
employs thefor various purposes.

Foreshadowing

While there are several
occurrences of foreshadowing, one striking example occurs whentellswho returns from the oracle
at Apollo,

For whoever he was who killed that
man
would as soon kill me with that same violent hand.
Helping that one,
therefore, I am helping myself. (ll.150-152)

Another
example of foreshadowing occurs when Oedipus declares that he will punish the man who is
responsible for the plague in Thebes:

I ban this man,
whoever he is, from all land
over which I hold power and the throne.
I decree
that no one shall receive him....
but instead that everyone must expel
him
from their homes, as this man is the source
of our pollution, as the
oracle. (ll.240-248)

Symbolism

While the seer Tieresias is
physically blind, Oedipus is symbolically blind. For instance, Oedipus says that he could not
fail "to see...