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Magnified View of Right Anterior Medial Wall of Orbit

Surgical Correlation

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Magnified view of right anterior medial wall of orbit. Dissection has been carried out all the way to the bone surface and retractors have moved orbital contents laterally. In this view, the superior orbital margin and upper medial wall of the orbit is formed by frontal bone. At the junction of the medial one-third and lateral two-thirds of the superior orbital rim is the supraorbital foramen or notch transmitting neurovasculature of the same name from the orbit to the upper eyelid and forehead. The anterior ethmoidal artery and nerve, branches of the ophthalmic artery and nasociliary nerve, leave the medial wall of the orbit through the anterior ethmoid foramen located in or along the frontoethmoidal suture and supply anterior and middle ethmoid air cells/sinuses. They then enter the anterior cranial fossa at the anterolateral edge of the cribriform plate and descend into the nasal cavity where they supply mucosa along the anterosuperior lateral nasal wall and nasal septum. The lacrimal bone and lacrimal fossa, containing the lacrimal sac, are also in view. The lacrimal sac and nasolacrimal duct have been retracted out of the fossa with the orbital contents. The lacrimal fossa is formed by both the lacrimal bone (anterior to its posterior lacrimal crest) and the frontal process of the maxilla (posterior to its anterior lacrimal crest). (Image courtesy of AL Rhoton, Jr.)

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