Macula

(MACK-yoo-luh) is the small, sensitive area of the retina needed for central vision. It contains the fovea.

Lens

Lens is the clear part of the eye behind the iris that helps to focus light on the retina. It allows the eye to focus on both far and near objects.

Iris

Iris is the colored part of the eye. It regulates the amount of light entering the eye through the pupil.

Pupil

Pupil (PYOO-pul) is 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.

Cornea

Cornea (KOR-nee-uh) is the clear dome covering the front of your eye. It helps your eye focus light so things look sharp and clear.

Sclera

Sclera (SKLEH-ruh) is the white outer coating of the eye.

Vitreous humor

Vitreous humor (VIT-ree-us HYOO-mer) is the clear gel that fills the inside of the eye.

Fovea

Fovea (FOH-vee-uh) is the center of the macula, where your vision is sharpest.

Optic nerve

Optic nerve (OP-tic nurv) is the bundle of more than 1 million nerve fibers that carry visual messages from the retina to the brain.

Retina

Retina (REH-tin-uh) is the light-sensitive tissue lining the back of the eyeball. It sends electrical impulses through the optic nerve to the brain.

Courtesy: National Eye Institute, National Institutes of Health (NEI/NIH)