Fig. 21 Dissection to show the intraorbital nasociliary nerve course. The parasympathetic nerve contribution to the ciliary ganglion from the inferior division of III nerve is also shown. (V1, Vl nerve; V2, V2 nerve; V3, V3 nerve; NCN, nasociliary nerve; CG, ciliary ganglion; SPCN, short posterior ciliary nerves; LPCN, long posterior ciliary nerves; PEN, posterior ethmoidal nerve; AEN, anterior ethmoidal nerve; ITN, infratrochlear nerve)