You may know someone who can’t tell the difference between specific colors — and there is a scientific reason it could be happening. The condition is known as color blindness. To share a better ...

Normal human color vision at photopic light levels is trichromatic and relies on the stimulation of three types of cone photoreceptors. While intrinsically photosensitive retinal ganglion cells ...

Color vision in vertebrates is facilitated by various types of retinal cone photoreceptors, each with specific spectral sensitivity 1. These cone signals, triggered by different light wavelengths, ...