How does Simon Mawer use imagery in The Glass Room?

Imagery:

"Hana leans forward and presses her lips against the warm swelling. The contact evokes in Liesel a vague and unnerving sense of sexual desire, focused not on Hana but on her own body, which is so foreign and so strange, so heavy with the future."

"He smiles and she feels iridescently happy, as though lights have been turned on, multicolored lights that shimmer and wobble and reflect off moving mirrors."