And Color-Vision Theories, Including the Theory of Vision Skip to main content Scientific American Sign in July 15, 1916 1 min read Color-Vision—II And Color-Vision Theories, Including the ...

Field experiments also showed that the animals use true color vision to identify red targets and that they have a clear preference for red colors. The researchers consider the Glaphyrid family to ...

Photoreceptors are light-sensitive cells in the eye. Just having them doesn’t prove an animal can see colors. To show true color vision, an animal must tell colors apart even when they have the same ...