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Anatomy of the Human Eye


Our eyes function a bit like a camera. The National Eye Institute has an informative animated diagram of the eye on their website. You can click on the various eye parts for a detailed description, or use the magnifying feature to view details up close.

Have you ever wondered about the different parts of the eye? Here’s a quick anatomy lesson on the human eyeball.

Anatomy of the Human Eye 101

  1. Aqueous humor – clear, watery fluid in the space between the crystalline lens and cornea.
  2. Conjunctiva – a clear membrane that covers the sclera and keeps our eyes from drying out.
  3. Cornea – transparent dome at front of the eye that covers the iris and pupil.
  4. Fovea – central part of the macula, containing rods, which is responsible for sharp vision.
  5. Iris – the colored part of the eye surrounding the pupil which acts a bit like a camera lens. The iris controls how much light enters into the eye.
  6. Lens or crystalline lens – this clear part of the eye is behind the iris and pupil. It focuses light on the retina.
  7. Macula – a small part of the retina responsible for central vision. The macula also contains the fovea.
  8. Optic nerve – bundle of nerve fibers carrying visual information from retina to the brain.
  9. Optic nerve head – area of the eye where the optic nerve enters the retina. All humans have a blind spot in this area.
  10. Pupil – the central black part of the eye. The size of the pupil gets regulated by the iris. Did you know our pupils seem black because all the light coming through this part of our eyes gets  absorbed by the retina. No light exits this part of the eye so when you look at someones pupils, they appear black.
  11. Retina – a light sensitive tissue, composed of rods and cones, that lines the back part of the eye.
  12. Sclera – refers to the white part of the eye. Our eye muscles attach to the sclera.
  13. Vitreous humor – clear jelly like fluid inside the part of the eyes behind the crystalline lens.

Eye Doctors Examine Eye Problems

If you are having vision problems, schedule an appointment with an optometrist at My Eyelab. An eye doctor will check the interior and exterior structures of your eye and can diagnose problems such as glaucoma and diabetic retinopathy. Eye care professionals also write prescriptions for their patients to use when purchasing corrective eye wear.



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