Cow Eye Anatomy:


1. Sclera - Tough, white outer covering of the eyeball.

2. Optic Nerve - A bundle of nerve fibers carrying information from the retina to the brain.

3. Cornea - Covering the iris and the pupil, the cornea is a tough and clear covering that begins bending light to make an image.

4. Aqueous Humor - Clear fluid that helps the cornea maintain its shape.

5. Pupil - A dark circle in the center of the iris which allows light into the inner eye. This cow pupil is oval, however the human pupil is round.

6. Iris - Controlling how much light enters the eye, this muscle can change shape to focus on near and far objects. The iris is suspended between the cornea and the lens.

7. Blind Spot - Lacking light sensitive cells, this spot in the eye is the place where the optic nerve leaves the retina.

8. Retina - A layer of light sensitive cells covering the tapetum. Connected to the brain through the optic nerve, the retina detects images focused by the cornea and the lens.

9. Tapetum - This shiny, pearl - looking material located behind the retina reflects light back through the retina.


10. Lens - The lens makes images on the eye's retina; it is usually clear and flexible, however it has hardened while this cow eye was preserved.

11. Vitreous Humor - Clear, thick jelly that maintains the eyeball's shape.