Main Page | See live article | Alphabetical index 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 This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.