How does Stephen King use imagery in Night Shift?

Imagery:

"There were eyes peering up at me through splits in the flesh of my fingers. And even as I watched the flesh was dilating, retreating, as they pushed their mindless way up to the surface."

"I've been thinking about that foggy night when I had a headache and walked for air and passed all the lovely shadows without shape or substance. And I've been thinking about the trunk of my car—such an ugly word, trunk—and wondering why in the world I should be afraid to open it."