Moreover, the CD93 knockout mice retinas displayed disrupted fibronectin matrix at the retinal sprouting front. Visual signals leave the retinas through the optic nerves. No damage was found in the mice's retinas or viscera. Terns have red oil droplets in the cone cells of the retinas of their eyes. Cattle have two kinds of color receptors in the cone cells of their retinas. Only the principal eyes have moveable retinas. Sonora survived the fall, but was blinded (caused by detached retinas in both eyes). Counts was born with detached retinas in both his eyes. Birds, turtles, lizards, many fish and some rodents have UV receptors in their retinas. Most animals have very large eyes with retinas constructed mainly of rods, which increases sensitivity. In the retinas are green rods, which are receptive to a wide range of wavelengths. Transplantation of retinas has been attempted, but without much success. At first, their retinas are poorly developed and their vision is poor. The power is limited to levels that do not damage human retinas.