In this way, the entire range of human color perception could be covered.

Some may not even be aware that their color perception is in any way different from normal.

He turned his attention to the visual system, focusing on human eye movement and color perception.

Finally, the color perception of the eye itself is quite adjustable by its surroundings, present and past.

Candidates must have normal color perception, and no speech impediment.

In people with normal color perception, each cone is tuned to perceive either red, green or blue light.

He has simply lost his sense of color perception.

Some patients notice that certain colors, particularly red, are less bright or vivid; others have a general loss of color perception.

In addition, affected individuals experience a reduction in color perception.

Or maybe it was a trick of his impaired colour perception.