Most laser vision correction procedures like LASIK involve shaping the cornea so that light can be properly focused on the back of the eye, or retina. This video shows how the anatomy of the eye works to harness light so that we can see. The role of the cornea in vision is also discussed.

Crisp images from our world require that light is focused on the back of the eye. When light cannot focus properly, it is called an error of refraction and is often caused by an irregular or improperly shaped cornea. LASIK improved errors of refraction in the eye by reshaping the cornea, as the animation explains.

Any object that we see is a collection of light energy focused on the retina. The lens of the eye helps us see near and far things equally well. This animation describes how the lens of the eye changes to accommodate and focus light.

This narrated animation describes the function of the major structures of the eye, namely the pupil, iris, lens, cornea, and retina.