Using an experimental technique called "Oz," researchers stimulated the human retina such that people saw a brand-new color.

Most people see a particular range of colors based on the cones in their eyes. Some, sadly, have one variety or other of ...

Scientists have come up with scenarios through which the first eye-like structure, a light-sensitive pigmented spot on the skin, could have gone through changes and complexities to form the human ...

It is refraction ... the normal. Light can be focused so that the rays appear to meet at a single point. Focusing light is important for getting clear images in our eye or in photographs, because ...