The cornea is the part of your eye that protects all of the sensitive tissue. It is the most transparent part of your eye. It is the layer that is exposed to the outside environment. The cornea plays an important part in protecting the eye and also helping it see clearly.
Since the cornea’s purpose is to be transparent and see-through, it should not have any blood vessels flowing through it. But, how does it get Oxygen? It actually absorbs Oxygen from the air around it! That is why the cornea is the only part of your body that does not recieve any blood supply.