SCENE + HEARD: Daily Post All About Chickens' Amazing Eyes By Staff Tuesday, March 19, 2019 3:53 PM On National Poultry Day, it's a good time to learn about Chickens' eyes. Chickens can see better in color, can detect and see light and color shades better than humans, have three eyelids, can move each eye independently and have a 300 degree field of vision without turning their heads. Light comes in through the cornea and iris and then stimulates nerve endings in the retina at the back of the eyeball. One of the big differences, however, is that chickens have tetra-chromatic vision, while we have tri-chromatic. Chickens have four wavelengths (blue, red, green and ultraviolet light) while we can only have three (blue, red and green.) Read more at Backyard Chickens.