Found only in the retinas of humans and other primates, the fovea is responsible for visual experiences that are rich in colorful, spatial detail. Some reasons behind the fovea's unusual perceptual ...

Q: When first learning about genetics, we’re taught that blue eyes are recessive and brown is dominant, but what about green eyes? Also, what are the squiggly lines in light-colored eyes? — Tim Patten ...

A close-up photograph of what appears to be a light-brown human eyeball shows the organ's expansive, cavernous depths surrounding a seemingly bottomless, black pit that, together, mimics the intricate ...

Beauty may be in the eye of the beholder, but when it comes to what gives tiger's eye its beauty, geologists may have been wrong for years, according to Penn State geoscientists. The popular stone ...