Lens (vision)
From Wikipedia, the free encyclopedia.

Light from a distant object and light from a near object being brought to a focus by changing the curvature of the lens.

The lens is a component of the eye. It refracts light entering the eye and projects it onto the retina.

The lens is clear and flexible; its curvature is controlled by muscles. By changing the curvature of the lens, the eye can focus at different "depths of field".

See also: visual perception, eye, iris

The original article can be found at: http://en.wikipedia.org/wiki/Lens_(vision).
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