The right temporal incision was performed on the marked area, cutting through the skin and superficial temporal fascia, and exposing the deep temporal fascia. Following, the undermining of the temporal region surrounding the incision was carried out in the interfascial plane, under direct vision, to prepare the optical cavity. The dissection proceeded to the orbital and zygomatic regions, under endoscopic vision, using a rigid endoscope (Karl Storz, model 7230 BWA) 18cm in length, 4mm in diameter and with a 30-degree angle. The dissection continued until the medial zygomatic-temporal vein (also known as sentinel vein) was reached; a xenon light source (Karl Storz, model 20131501) was used to illuminate the optical cavity.