Anatomy Roof: Orbital process of frontal bone (anterior). Lesser wing of sphenoid (posterior). Lateral wall: Greater wing of sphenoid (posterior). Zygomatic process of frontal bone. Frontal process of zygomatic bone. Medial wall: Lamina papyracea of ethmoid bone (posterior). Lacrimal bone (anterior). Floor: Orbital plate of maxilla. Inferior orbital fissure (posterolateral). ORBITAL COMPARTMENTS AXIAL DIAGRAM 1) Globe space Anterior chamber Rupture of globe. Hyphema Cataract.

Common causes Inflammatory: orbital pseudotumor, thyroid eye disease, orbital inflammatory syndrome. Infective: orbital cellulitis, cavernous sinus thrombosis, orbital abscess. Vascular: carotid-cavernous fistula, cavernous hemangioma/venous malformation, retrobulbar hemorrhage. Neoplastic: orbital lymphoma, optic nerve glioma ,schwannoma, meningioma, metastatic disease. Traumatic / iatrogenic: post-traumatic or post-surgical hematoma, orbital compartment syndrome. Developmen