Lens (vision)

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