This has been a serious problem for me since 2012. One morning I got out of bed and staggered. I was so dizzy I could barely walk. I became nauseous and was bed ridden for two days. I couldn't focus at all. I was hospitalized and while there I realized I had extreme double vision, as in seeing two distinct objects with one positioned horizontally over the other. I won't go into detail concerning all the ensuing years of doctors visits.
I didn't drive for 6 months. It subsided, then a few years later while driving 65+ on a two lane highway I was suddenly struck with the same thing, only this time it felt like a severe twitch in my eye. Got myself to ER. For weeks I had what felt like a twitch, but the docs couldn't see anything. I also had a loud thumping in my ear. Then I realized one day my left eyelid was actually rippling.
Two different drugs used as muscle relaxers seemed to help. Docs now think I had a stroke, however this occasionally visits the other eye. A neuro ophthalmologist diagnosed damage to a major muscle in left eye, which is the worst. I was unable to drive in early 2017. I am now having severe episodes of CFS and have been bedridden for most of 2018. Some mornings when I put on my glasses (with prisms), my left eye does not want to join the party for several hours.
I take Lorazepam when I know I will have to drive. Or when I need to focus. At times I feel like I am not wearing my own glasses. I have severe balance issues anyway, then add the eye issues to that and everything else that is going on. Just one of many, many issues to deal with.