Eye Anatomy

Don’t remember the lessons on eye anatomy from your high school biology class? That’s OK—we have provided the following eyeball illustration and terms just to give you a refresher course. And we won’t give you a pop quiz afterwards…

CORNEA: Transparent front segment of the eye that covers iris, pupil, and anterior chamber, and provides most of an eye's optical power.
PUPIL: Variable-sized, circular opening in center of iris; it appears as a black circle and it regulates the amount of light that enters the eye.
IRIS: Pigmented tissue lying behind cornea that (1) gives color to the eye, and (2) controls amount of light entering the eye by varying size of black pupillary opening; separates the anterior chamber from the posterior chamber.
LENS: Natural lens of eye; transparent intraocular tissue that helps bring rays of light to focus on the retina.
RETINA: Part of the eye that converts images into electrical impulses sent along the optic nerve for transmission back to the brain. Consists ofmany named layers that include rods and cones.
MACULA: Small, specialized central area of the retina responsible for acute central vision.
VITREOUS: Transparent, colorless, gelatinous mass; fills rear two-thirds of the interior of the eyeball, between the lens and the retina.
OPTIC NERVE: Largest sensory nerve of the eye; carries impulses for sight from retina to brain.
SCLERA: The white of the eye; a protective fibrous outer layer covers all of the eyeball except for the part covered by the cornea.
CILIARY BODY: A muscular ring under the surface of the eyeball; helps the eye focus by changing the len’s shape and also produces aqueous humor.
CHOROID: The vascular layer between the sclera and the retina; the blood vessels in the choroid help provide oxygen and nutrients to the eye.

Our Locations

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Marshfield Eye Clinic

1350 Spur Drive, Suite 150
Marshfield, MO 65706-2557

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Buffalo Eye Clinic

112 West Commercial Street
Buffalo, MO 65622-7614

Our Hours

  • Monday:8:00 am  to  5:00 pm
  • Tuesday:8:00 am  to  5:00 pm
  • Wednesday:8:00 am  to  5:00 pm
  • Thursday:8:00 am  to  5:00 pm
  • Friday:8:00 am  to  5:00 pm
  • Sat. & Sun.:CLOSED

We are closed for lunch each day from 12-1.

We Support

Lions Club

Do you have an old pair of eyeglasses you are no longer using? We are presently collecting eyeglasses for the local Lion's Club chapter. Contact Us for more information.