| A | B |
|---|
| iris | The colored part of the eye that regulates the amount of light entering the eye. |
| lens | A clear part of the eye behind the iris that helps to focus light, or an image, on the retina. |
| optic nerve | A bundle of nerve fibers that carries visual messages from the retina to the brain. |
| pupil | The opening at the center of the iris. |
| retina | the light-sensitive tissue lining at the back of the eye that converts light into electrical impulses that are sent to the brain through the optic nerve. |
| vitreous gel (vitreous humor) | A clear gel that fills the inside of the eye. |
| cornea | The clear, outer part of the eye's focusing system located at the front of the eye. |
