ABSTRACT
It may be difficult to differentiate the ophthalmoplegia of ocular myasthenia gravis and that of Graves’ ophthalmopathy clinically. The ocular symptom most likely to occur in both disorders is diplopia. Uni-or bilateral ptosis, which is the other leading symptom of myasthenia gravis, can also, albeit rarely, occur in Graves’ disease. Indeed, even most recent tables of differential diagnosis of myasthenia gravis put endocrine orbitopathy in first place (1). The ocular symptoms of both diseases can be exacerbated by iodinated contrast media (2).
