This podcast, Part 1 of a 3-part series on thyroid eye disease (TED), explores the clinical features of both active and chronic disease, providing a foundation for understanding how to effectively diagnose and manage this condition. Through expert discussions, the faculty review key diagnostic tools and clinical signs, offering insights into the spectrum of TED activity and duration. Listeners will also gain guidance on selecting appropriate treatments tailored to varying stages of disease, preparing them to optimize care for patients with TED.