Autogenous Fascia Lata Graft Fixation to Treat Exotropia Resulting From Iatrogenic Medial Rectus Transection

Purpose: To describe autogenous fascia lata graft fixation as a novel method to treat exotropia related to medial rectus (MR) muscle injury following functional endoscopic sinus surgery. Methods: Three consecutive patients with MR transection and exotropia after functional endoscopic sinus surgery were selected. Preoperative examination was performed; no MR function was noted for over 3 months after injury. CT and dynamic functional MRI were performed, where MR transection and medial wall breach were noted. An autogenous fascia lata graft was harvested and fixated from the remaining periosteum of the posterior-most extent of the medial orbital wall and attached to the globe at the MR insertion. In addition, an ipsilateral lateral rectus muscle recession was performed. Results: Alignment of the eyes in primary gaze and downgaze was achieved and remained so at the 3-month postoperative examinations, with minimal head turn or prism correction (

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