Fig. 3. Schematic demonstrates the sensory dermatomes of the fifth cranial nerve: V1 ophthalmic division (fine stippling), V2 maxillary division (dark stippling), V3 mandibular division (intermediate stippling). (From Rootman J (ed.): Disease of the Orbit: A Multidisciplinary Approach. Philadelphia: JB Lippincott, 1996:9.)