Its eyes are open and do not react tolight.

He saw Clearwater's eyes react to the trigger word.

Your eye is reacting to the proportions of the vegetation.

Green and yellow fluorescence was chosen because the human eye reacts best to these colors.

A typical human eye will react to wavelengths in air from about 380 to 750 nm.

He knew instantly that the eye had reacted to his presence.

Nuie's heart beat strongly and his eyes reacted to the light.

Stone's eyes reacted; only a flicker of recognition, but the re- action was there.

Sight - This episode covers the aspect of how our eyes react in emergency situations.

The eyes reacted to that, ever so slightly.