I had aortic arch repair almost 4 years ago and I have the exact same thing!! About a year after my surgery it started- I get these episodes about 1 time a month with double vision and it feels like my eyes are moving or I can’t move them. Lasts only a few seconds sometimes a minute but always very brief and resolves on their own. I have the flashing ribbon on the edge of my peripheral vision at times also- last week it lasted about an hour. I have had mri- was essentially normal they said. My bp tends to stay lower side. My docs have no clue- recommend me going to see a neurologists just haven’t wanted to take that next step yet. But I am a little relieved to see it may not be me going crazy!!! And I never had anything like this prior to surgery, thank you all for sharing!!!