Fig. 2From: Is orbital floor a reliable and useful surgical landmark in endoscopic endonasal surgery?: a systematic reviewSagittal view of the orbital floor in relations with the skull base. (FR-frontal sinus, ORBIT-orbit, ES- ethmoid sinus, MS - maxilla sinus, SS- sphenoid sinus, ER- level of the ethmoid roof, OF- level of the orbital floor and SB- skull base (blue))Back to article page