CIDESCO Certification Practice Exam

The roof of the eye socket, also known as the orbital cavity, is primarily formed by the frontal bone. This bone plays a crucial role in supporting the forehead region and provides a strong structure above the eyes, protecting the contents of the orbital cavity.

The sphenoid bone does contribute to the structure of the orbit, but it does not form the roof. It is located more posteriorly and has a position that supports the sides and back of the orbit. Structures such as the zygomatic bone and the lacrimal bone are located on the sides and front of the eye socket, respectively. The zygomatic bone helps form the cheekbone area, while the lacrimal bone is involved in the formation of the medial wall of the orbit.

Given this anatomy, the frontal bone is the primary bone forming the roof of the eye socket.