New Eyewear Could Help People with Red-Green Color Blindness
Tuesday, February 5, 2013 - 15:00
in Biology & Nature
Why do humans see colors? For years the leading hypothesis was that color vision evolved to help us spot nutritious fruits and vegetation in the forest. But in 2006, evolutionary neurobiologist Mark Changizi and colleagues proposed that color vision evolved to perceive oxygenation and hemoglobin variations in skin in order to detect social cues, emotions and the states of our friends or enemies. Just think about the reddening and whitening of the face called blushing and blanching. They elicit distinct physiological reactions that would be impossible without color vision. [More]