Me thinks ur I doc has a couple of screws loose.. . .
I have macular degeneration w/similar but not exact symptoms as you explained. There isn't much that can be done for that. Get a good eye supplement. Bausch & Lomb makes a good one. It'll retard degeneration, some time stop it and some times reverse it.
Mine has been holding steady for years.
Symptom is that where ever you are focused on the reticle it will be crooked. When I move my focus from post to post, one mil dot at a time, the reticle looks like a crawling snake. It's consistent so I can still shoot pretty darn decent.
However it does reduce brightness.
If your prob is dryness or something outside of your eye, I'd see an different doc.