Eye dissection lab

In our class we dissected a sheep's eye. In the first picture to the left, you can see the external eye. In the middle of the eye is the cornea (which  is a greyish color).  The cornea's function is to protect the eye and it is the first entry point of light. Surrounding the cornea is the sclera which is referred to as "the whites of our eyes". The sclera's function is to protect because it is very tough. On the right of the picture you can see the fatty tissue that we have taken off the eye already.

Here is a picture of the back of the eye. The probe is pointing at the optic nerve. The function of the optic nerve is to transfer signals from the eyes to the brain.

 Next we cut open the eye. In this picture, you can see the lens in the middle of the eye and it is surrounded by aqueous humor. It provides the eye with nutrition and it maintains the internal pressure in the eye.











The lens (pictured below)'s function is to focus on objects to provide the retina with a clear image.

The black/grey ciliary body surrounds the pupil and iris. The function of the ciliary body is to produce aqueous humor fluid. It also keeps the lens in place.

The pupil's function is to let light enter the eye. The iris controls how much light is entering the eye.

This is a picture of the vitreous humor that seeped out of the eye during the dissection. It fills the space behind the lens and it's function is to help the eye maintain its shape.

In this last picture, you can see the tapetum lucid which is a reflective coating that helps the sheep have good night vision. The scalpel in this picture is pointing to the optic disc. The optic disc is where the nerves attach to the optic nerve.