Cow Eye Dissection

Aqueous Humor

-A clear fluid that helps the cornea keep its rounded shape

Blind Spot (Optic Disc)

-Where all nerves from the retina join to form the optic nerve.
-Each eye has a blind spot where there are no light-sensitive cells.

Cornea

-A tough, clear covering over the iris and the pupil that helps protect the eye.
-Light bends as it passes through the cornea.
-The cornea 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.
-Cow irises are brown, humans can have many colors.

Lens

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

Optic Chiasm

-Point in the brain where the visual field information from each eye "crosses over" to the appropriate side of the brain for processing.
-Not visible on eye, but know this for the practical.

Optic Nerve

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

Pupil

-The pupil is the dark circle in the center of your iris.
-It lets light into the inner eye.

Retina

-The layer of light-sensitive cells at the back of the eye.
-Detects images focused by the cornea and the lens.
-Connected to the brain by the optic nerve.

Sclera

-Thick, tough, white outer covering of the eyeball.

Tapitum Lucidum

-Colorful, shiny material located behind the retina.
-Enables night vision.

Vitreous Humor

-Thick, clear jelly that helps give the eyeball its shape.