Fig. 19 Schematic drawing of the trigeminal nerve course in the orbit. (V1, Vl nerve; V2, V2 nerve; V3, V3 nerve; FN, frontal nerve; SON, supraorbital nerve; STN, supratrochlear nerve; LN, lacrimal nerve; ZTN, zygomaticotemporal nerve; ZFN, zygomaticofacial nerve; ZN, zygomatic nerve; NCN, nasociliary nerve; SB, sensory branch to the ciliary ganglion; CG, ciliary ganglion; SPCN, short posterior ciliary nerves; LPCN, long posterior ciliary nerves; PEN, posterior ethmoidal nerve; AEN, anterior ethmoidal nerve; ITN, infratrochlear nerve; ION, infraorbital nerve)