How does Chief Bromden change?

Bromden changes because he comes out of the fog and sees the world around him. He awakens, literally and figuratively, and watches the dog outside the window. For the first time in ages, he is truly aware of the outside world. He is acknowledging it and feels in some way a part of it; he is not simply ignoring it or afraid of it. He can conceive of existence outside of the institution in ways that he could not imagine before.