Post covid problem. Suggestion and help.

Sir/Mam I have had mild covid with lost of taste and smell in last week of April and on 21may i have noticed that i have double vision problem( vertical double vision) existing with either eye closed. I have consulted with a lot of eye doctor and they all have said you do not have any problem in your eyes. And then i have visited to a neurologist where he suggested for brain+pns mri. Pns mri showed nothing whie brain mri shows partially empty sella. He said that its a structural defect and he is 99% sure double vision is not due to this than i again consulted with different neurologist he also said you do not have any problem with in your brain. Now its been 3 month since i noticed double vision and i dont know what to do now. Please give me suggestion and help.