“ Rays of light come to our cornea and lens and are focused on the retina, which is like the film in your camera.
That film, made up of millions of neurons, transmits a message by the optic nerve to the brain.
This retina is so remarkable that it takes a photon of light, the smallest unit of light there is,
converts one molecule of something called Rhodopson, changes one molecule.
And that triggers a chemical response and a neural response, and then that's all integrated.

This is the most remarkable computer, with the most remarkable brain computer in the universe.
It is that precious an organ, for our most precious sense … Sight”

Stephen J. Ryan, M.D.
President, Doheny Eye Institute