2.1. Clinical Data

From November 1, 2015, to November 1, 2017, altogether 10 cases with small tumors located at the lateral orbital apex were identified from the electronic medical record system of the Eye Hospital of Wenzhou Medical University. All cases were diagnosed by high-resolution computed tomography (HRCT) or magnetic resonance imaging (MRI). Best corrected visual acuity (BCVA), visual field, pupil reflex, eye movement, and complete status of the anatomy of both eyes were checked preoperatively and postoperatively in all cases. Cases with visual decline, imminent visual impairment, or visual field defect caused by the tumor were referred to surgery. Patients were followed up to 3 months after surgery. Informed consent was obtained from all patients before surgery.