Abnormal enlargement of the right superior, medial, and lateral rectus muscles is noted (intermediate signal on T1WI, T2WI, and post-contrast avid enhancement). There is extrinsic compression of the right globe and resultant proptosis. The right globe is otherwise normal with an intact lens. The optic nerve is also intact.
The left medial rectus muscle is also bulky.
There is no intracranial abnormality.