How does Cormac McCarthy use imagery in No Country for Old Men?

Imagery:

"The man looked at Chigurh’s eyes for the first time. Blue as lapis. At once glistening and totally opaque. Like wet stones."

Chigurh's leg is "throbbing like a pump." (pg. 161)

"He studied the blue floodplain out there in the silence. A vast and breathless amphitheatre. Waiting. He’d had this feeling before. In another country. He never thought he’d have it again."