Hello. I am a 48-year-old woman, in good health, with history of allergies and asthma. Sudden onset of intermittent binocular vertical diplopia 8 years ago. At the time, was also experiencing a lot of trouble with allergies: eyes were red,itchy, swollen; I rubbed them excessively. Diplopia happened during early morning vigorous exercise; worse on downgaze and looking to right. I learned to control it and avoid it by tilting my head. After returning home, had bloodwork and brain MRI--all normal. Diplopia occurred off and on over next years,during morning exercise; allergies had subsided. I had TAH/BSO last year, recovered well, resumed morning exercise routine. Also had flare-up of allergies after surgery (itchy eyes; eyelid edema; etc.)Began having diplopia again--almost always only during morning exercise (running) and always controllable. I do not experience it if I run or play soccer later in the day. Also, began having tingling in neck and midback, and deep shoulder pain on right, extending down arm. PCP said these latter symptoms probably from computer use. Referred to neuro; repeat MRI of brain and c-spine and extensive blood tests for everything--all normal. Neuro said right-sided reflexes not as brisk as left ones, but doesn't want to put much stock in that. I will have LP and VEPs this week. I feel so very healthy, though. I can't help but sense some connection between morning exercise, allergies, and the diplopia. Neuro willing to refer me to top neurophthalm. if I wish. What are possible explanations for this diplopia? Don't 2 normal MRIs rule out MS? thanks!