Cow Eye Dissection

Aqueous humor

A clear fluid that helps the cornea keep its rounded shape

Blind spot

The place where all nerves from the retina join to form the optic nerve. Each eye has one of these where there are no light sensitive cells

Cones

One kind of light sensitive cell in the retina. These give you color vision in bright light.

Cornea

A tough clear covering over the iris and the pupil that helps us protect the eye. Light bends as it passes through here. This begins bending light to make an image; the lens finishes the job

Iris

A muscle that controls how much light enters the eye. It is suspended between the cornea and the lens. A cow's is brown. Human have these that come in many colors, including brown, blue, green, and gray.

Lens

A clear, flexible structure that makes an image on the eye's retina. This is flexible so that it can change shape, focusing on objects far away and close up.

Myelin

The fatty layer that surrounds each nerve fiber.

Optic nerve

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

Pupil

This is the dark circle in the center of your iris. It's a hole that lets light into the inner eye. Your's is round. A cow's is oval.

Retina

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

Rods

One kind of light sensitive cell in the retina; respond to dim light.

Sclera

The thick, tough, white outer covering of the eyeball.

Tapetum

The colorful, shiny material located behind the retina. Found in animals with good night vision; reflects light back through the retina.

Vitreous humor

The thick, clear jelly that helps give the eyeball its shape.

scalpel

Surgical knife

Formalin

a colorless solution of formaldehyde in water, used chiefly as a preservative for biological specimens