A man in his 30s who had sustained a stab injury to his left orbit 15 years earlier was assessed for a proptotic left eye. His visual acuity was 6/6 Snellen in both eyes with restricted elevation of his left eye. A scar resulting from the stab wound was clearly visible just below his left brow. The pulsatile proptosis had a difference of 14 mm between his eyes. His left eye had a palpable thrill, audible bruit, chemosis, dilated conjunctival blood vessels, and a swollen upper eyelid.