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Editor,—Gaze evoked amaurosis is an uncommon symptom usually associated with intraconal masses such as cavernous haemangioma1 or optic nerve sheath meningioma.2 3 Patients describe transient loss of vision in eccentric positions of gaze with full recovery of vision on returning to the primary position. The cases previously published have all been unilateral. We describe a case of bilateral gaze evoked amaurosis in a patient with dysthyroid orbitopathy.
CASE REPORT
A 62 year old smoker gave a 12 month history of transient bilateral loss of vision on upgaze associated with supraorbital discomfort. His hobby was flying radio controlled model aeroplanes but after crashing two of these during amaurotic episodes he presented to an ophthalmologist. Two years previously he had required admission for cardiac failure associated with thyrotoxicosis but after treatment with iodine-131 and carbimazole his thyroid status had been stabilised.
Ophthalmic examination revealed symmetrical axial proptosis (26 …