hello. Have posted earlier regarding transient episodes of binocular vertical diplopia: sudden onset 8 years ago when I was having awful allergic symptoms involving eyes and rubbed them excessively. Have appt with top neuro-opthal soon, but curious whether it's time to think outside the box. Diplopia comes on during morning exertion--jogging or sometimes simply straining (e.g.,on the toilet) or bending down for the newspaper or taking out the recycling; weight-lifting too. Lasts from few seconds to few minutes. No headache. I can resolve it by looking up. Most dramatic during morning exercise, with greatest divergence of images (generally downgaze and to the right). Does not occur when exercise later in the day or in the evening, even with very vigorous workouts. Have had brain MRI w & w/o contrast, c-spine MRI, VEPs, LP, MRA and extensive bloodwork to rule out many things, incl. myasthenia--all negative. Neuro sees nothing wrong with eyes. No history of severe head trauma. What does pattern of morning symptoms suggest? intracranial pressure? vascular problem? (LP did not test for pressure changes, just for oligoclonal bands). I experience it 4-5 times a week; not sure if has increased or just that I'm more sensitized to how often I'm on the threshold of having it. Otherwise, am healthy, fit, thin 48-year old woman; history of anemia, now resolved after hyst. & ooph last year. Also have allergies & asthma, well controlled. Any ideas? Is it safe for me to exercise? Neuro doesn't know. Friend who is doc suggested cardiac work-up? I have excell. chol & low BP. many thanks!