Transnasal Endoscopic Approach via Inferolateral Periorbital Periosteal Line for the Posterior Orbital Region

We report a minimally invasive transnasal endoscopic approach via the inferolateral periorbital periosteal line, which allows for safer surgery in the inferolateral orbital region without external incisions. This method enables better visibility while preserving physiological function and reducing cosmetic risks by minimizing fat deviation and avoiding problems such as ocular compression and orbital bone resection commonly encountered in open and transorbital surgery. This technique may be an optimal alternative or complement to traditional open surgery.