Dysthyroid ophthalmopathy is an inflammatory disease of the orbit, combined or not with thyroid disorders. However, pure ophthalmologic forms exist, and the diagnosis can be made by the ophthalmologist. The diagnosis is made by examining eyelid malposition, oculomotor disorders, inflammatory signs, proptosis measurement, and by the search for optic nerve pain. We discuss the NOSPECS classification, which can evaluate the severity and progression of the disease.