Sorry to hear about your problems with Ethambutol.
I can relate. Have been on it since 4/07. I already had glaucoma when I was diagnosed with MAC. Starting in about Sept., my field of vision started getting worse. My glaucoma specialist can’t ascertain if it is caused by the Ethambutol or if it’s the natural progression of the disease but it didn’t start to worsen until after I started on the Ethambutol. I have another check-up in Feb. MAC Dr. wants me to keep on Ethambutol. Appreciated everyone’s comments on nutrition.