If we wait a few minutes, the pupil expands and our vision improves greatly as more light pours in.

His pupils had expanded to such an extent that his eyes appeared more black than gray.

Ted's pupils expanded and contracted like a heartbeat you could see.

The Tolun's pupils expanded again, turning the eyes black.

The pupils expanded to swallow all else, depthless pools of night.

Indeed, at low light levels a cat's pupils will expand to cover most of the exposed surface of its eyes.

He could tell by the way her pupils suddenly expanded that it was hurting her.

In a moment her brown eyes went opaque, the pupils expanding.

The pupil of the eye expands as much as 45 percent when a person looks at something pleasing.

Her pupils expanded until there was only a thin green outline around their beckoning darkness.