Thyroid eye disease (TED) is a heterogenous autoimmune disease and the main extra-thyroidal manifestation of Graves’ disease. There are limitations with the current disease classification of TED that may mislead the underlying pathophysiology and treatment choices of the disease. Phenotype is how the disease looks, which is secondary to the interaction between the patient tissue and its response to the disease. It is crucial to classify the phenotype of TED as not everyone follows the classic disease course of active inflammatory followed by inactive, “burnt-out” TED phases with associated signs. TED patients are usually classified as active if they have the signs of inflammation as suggested by the clinical activity score (CAS)—eyelid oedema/redness, conjunctival redness, caruncular swelling and limitation of the eye movements. However, patients can present with a low CAS score but have progressive or severe disease. Patients can have a “white eye” and optic neuropathy or white eye with limitation of the eye movements. We describe six different phenotypes: (1) Congestive, (2) White eye expansion, (3) White eye apex, (4) Hydraulic apex, (5) Cicatricial active and (6) Cicatricial passive. Classifying these phenotypes of TED in addition to the traditional active-inactive classification, directs the clinician to considering the different pathophysiologies in order to provide the best tailored treatment for the patient.