How does the human eye work?

The human eye belongs to a general group of eyes found in nature called "camera-type eyes.". Just as a camera lens focuses light onto film, a structure in the eye called the cornea focuses light onto a light-sensitive membrane called the retina. read more

Light rays enter the eye through the cornea, the clear front “window” of the eye. The cornea’s refractive power bends the light rays in such a way that they pass freely through the pupil the opening in the center of the iris through which light enters the eye. The iris works like a shutter in a camera. read more

The human eye is an amazing organ. WebMD explains how it works. read more

The human eye belongs to a general group of eyes found in nature called "camera-type eyes." Just as a camera lens focuses light onto film, a structure in the eye called the cornea focuses light onto a light-sensitive membrane called the retina. read more

The macula is the bull's-eye at the center of your retina. The dead center is called the fovea. Because it's the focal point of your eye, it has more special, light-sensitive nerve endings, called photoreceptors, than any other part. Photoreceptors come in two kinds: rods and cones. read more