How does Robert Crais use imagery in L.A. Requiem?

Example of Imagery:

"Officer Pike took off his dark glasses and looked at her. She felt her breath catch. His eyes were the most liquid blue, the blue of the sky over the high deserts of Sonora, the blue of the ocean where it has no bottom and is infinitely clean. But it wasn't the blue that stopped her breath. For just a moment when the glasses were first pulled away, she could have sworn that those eyes were filled with the most terrible and long-endured pain."