Fig. 6 Orbital apex with nerves coursing through foramina. (LN, lacrimal nerve; NCN, nasociliary nerve; FN, frontal nerve; VI, abducens nerve; IV, trochlear nerve; INF III, inferior division of cranial nerve III; SOV, superior ophthalmic vein; II, cranial nerve II; SUP III, superior division of cranial nerve III; IOV, inferior ophthalmic vein; ZN, zygomatic nerve; V2, V2 nerve; SGB, sphenopalatine ganglion branches)