The findings of exophthalmos (bulging eyes), conjunctival inflammation, and periorbital swelling are hallmark features of Graves ophthalmopathy, a manifestation of autoimmune hyperthyroidism.

Toronto Notes 2023 – Endocrinology, “Thyroid Disorders”:

“Graves ophthalmopathy: proptosis, periorbital edema, conjunctivitis, and diplopia due to extraocular muscle involvement. Often independent of thyroid levels.”

MCCQE1 Objectives (Internal Medicine > 36-1: Thyroid Disease):

“Candidates must recognize and manage Graves disease and its ocular manifestations.”

Myasthenia gravis may cause diplopia but not proptosis or swelling. Pseudotumor and cellulitis are painful and acute. Allergic conjunctivitis is itchy but lacks proptosis.