Anatomy of an Eye

Graphic representation of the anatomy of an eye
Courtesy: National Eye Institute, National Institutes of Health

Cornea - The clear outer part of the eye's focusing system located at the front of the eye.

Fovea - The center of the macula that gives the sharpest vision.

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.

Macula - A small, sensitive area of the retina that gives central vision. It is located in the center of the retina and contains the fovea.

Optic Nerve - A bundle of more than one million nerve fibers that carries visual messages from the retina to the brain.

Pupil - The opening at the center of the iris. The iris adjusts the size of the pupil and controls the amount of light that can enter the eye.

Retina - The light-sensitive tissue lining at the back of the eye. The retina converts light into electrical impulses that are sent to the brain through the optic nerve.

Vitreous Gel - A clear gel that fills the inside of the eye.