Fig. 1 Anterior view of the orbit. The walls are made up of seven bones; the roof consists of the sphenoid (S) and the frontal bone (F); the lateral wall consists of the sphenoid (S) and zygomatic bones (Z); the floor consists of the maxilla (M), the palatine (P), and zygomatic bones (Z); the medial wall consists of the sphenoid (S), maxilla (M), ethmoid (E), lacrimal bones (L), and supraorbital notch (SON).