In order to begin to fully understand orbital cancer, it is important to understand the anatomy of the region. The orbit is the part of the face that houses the eye. It includes the eye socket and all of its parts, such as muscles, nerves, lymphatics, blood vessels, the structures that produce tears, and the eyelids. The brain is located just above and behind the orbit. The eye sits within the orbit, but is not technically a part of the orbit. Tumors that start in the eye itself will therefore not be covered here.
