The design of bi-optical eye is a curious one. There are tradeoffs between various parametes which are carried over millenia to suit the subject's environment. read more
The primates have eyes that detect color (important if you need to know whether fruit is green and therefore not ripe, or red or yellow and therefore ripe enough to eat). The primates therefore traded good night vision in exchange for good color vision. Since humans are primates, we are stuck with good color vision and bad night vision. read more
Chameleons have a distinctive visual system that enables them to see their environment in almost 360 degrees (180 degrees horizontally and +/-90 degrees vertically). They do this in two ways. The first is with anatomical specializations that enable the eyes to rotate with a high degree of freedom. read more