I realized in my 50s that I had been reading less and less for many years. I didn't know why, and it bothered me. Then, one day in the drug store, they had these reading glasses on one of those wire displays. On a whim, I tried one on. My gawd! I could see! My vision had declined so gradually I didn't notice it, but the reason I wasn't reading anymore was because of the effort to make out the letters.

The reading glasses solved that problem, and I was reading again. I also had been in denial and finally got progressive lenses for my glasses.

I know this is not your particular issue, what's happening to you sounds awful.