This document provides information on thyroid associated orbitopathy (TAO), including its epidemiology, etiology, pathogenesis, clinical features, investigation, diagnostic criteria, treatment, and prognosis. It notes that TAO is an autoimmune inflammatory disorder affecting the orbital and periorbital tissues, thyroid gland, and sometimes skin or digits. It most commonly presents in the 4th-5th decades and affects women more than men. Smoking increases risk. Treatment involves supportive measures, medications, orbital radiation, and surgery. TAO is typically self-limiting over 1-3 years but may reactivate in some patients.