A muscle that controls how much light enters the eye. It is suspended between the cornea and the lens. Cows is brown.

It is a reflex. The pupil constricts when the circular muscle, controlled by the PNS contracts.

Reflected light first travels through your cornea. The light then shines through your pupil. Then it shines through your lens. It bends the light then...

This layer of light sensitive cells at the back of the eye. This detects images focused by the cornea and the lens. It is connected to the brain by th...

The bundle of nerve fibers that carry information from the retina to the brain.

The colorful, shiny material located behind the retina. It is found in animals with night vision.

The place where the optic nerve leaves the retina. This is where there are no light sensitive cells.

A thick, clear jelly that helps give the eyeball its shape

Located in the dark circle in the center of your iris. It is a hole that lets light into your eye. ( cows is oval while humans in round )

The cow eye has a tapetum while the humans do not. Humans are not nocturnal, therefore they do not need to see in the dark. Cows have oval shaped pupi...

A thick thought white outer covering of the eyeball

A clear fluid that helps the cornea keep its shape. It is made out of protein and water.

they can only look up down left right, only four muscles for that.