First her ears hear; they open. Then her eyes can see; they open. Her face, a revolving door, swings open and shut, open and shut. She no longer sleeps at night; it’s too hard to breathe after four breast-implant operations. She drops, like rain down a window, collapsing in fatigue, breathing through her mouth, and even exhaustion seems miraculous.
The above lines are from 'The Coming Flood', a short story by Andrés Barba. What does the line in bold mean?