This allows them to perceive ultraviolet light, which is involved in courtship.

He was able to develop a bit of an ability to perceive light, but he remained blind.

Humans perceive white light as the mixture of the three additive primary hues: red, green, and blue.

Most colorblind people are either green blind or cannot perceive red light to some degree.

Some birds can perceive ultraviolet light, which is involved in courtship.

"At that point we were pretty sure the shrimp could perceive light."

It produces an effect much closer to the way the human eye actually perceives light.

To be accepted into the study, patients had to have visual acuity less than 20/50 and be able to perceive light.

She was the one who always pulled him through the hardest times, and made him perceive light in the darkness.

Neither of us perceive specific light well, so could not ascertain its precise orientation, but there was no question.