News Life Fiber optics in mammals’ eyes separate colors Müller cells shunt red and green light to cones and let blue light leak onto rods By Tina Hesman Saey July 10, 2014 at 12:48 pm - More than 2 years ago Share this:Share Share via email (Opens in new window) Email Click to share on Facebook (Opens in new window) Facebook Click to share on Reddit (Opens in new window) Reddit Click to share on X (Opens in new window) X Click to print (Opens in new window) Print Special cells in the retina split light into different colors to enable sharp vision during the day without harming night vision. Those long and tubelike cells, called Müller cells, snake through the layers of the retina.