Fig. 20 Cutaneous distribution of V1 and V2 nerves. (V1, V1 nerve; V2, V2 nerve; SON, supraorbital nerve; STN, supratrochlear nerve: ITN, infratrochlear nerve; ION, infraorbital nerve; LPN, lateral palpebral nerve; ZFN, zygomaticofacial nerve; ZTN, zygomaticotemporal nerve)