blurred vision during exercise

31/male here I've had an MRI of the brain, blood tests, echocardiogram, but I get blurred vision during cardiovascular exercise.    Usually when I look from something closer up to something farther away or vice versa it takes too long for my eyes to focus.   But I've only noticed it during exercise.    I do have a 3.5x2.3 cm bone tumor just above my left eye that has been watched for years and has never changed so I've had plenty of head scans and my actual visiual field tests and dilated eye exams have been normal when checked.  

[John C Hagan III, MD, FACS, FAAO]

Your symptoms are such that you need to see a neuroophthalmologist. Find one at www.aao.org or ask the ophthalmologists that have examined you to refer you to the one they respect most.

JCH MD