The zygomatic-temporal vein was previously cauterized with an endoscopic grasper (Karl Storz, model 50232 GG) and incised with scissors (Karl Storz, model 50231 GW) to allow dissection toward the lateral orbital rim. In this region, after passing the lateral palpebral ligament, the undermining ?) deepened, becoming subperiosteal on the zygomatic bone. The subperiosteal undermining ?) progressed along the whole inferior orbital rim up to its most medial portion, superior to the infraorbital nerve, to completely release the inferior orbital rim under endoscopic vision with the aid of an elevator (Karl Storz, model 50205s).