Light rays enter the eye through the cornea, pupil, and lens. These light rays are focused on the retina, the light-sensitive tissue lining the back of the eye. The retina sends signals through the optic nerve to the brain, where these signals become the images we see. Learn more about your eyes, eye health and how to take care of your vision. Visit EyeSmart by the American Academy of Ophthalmology. https://www.aao.org/eye-health