Oh I feel your pain. I have been wearing glasses for almost 50 years and have never had trouble adjusting to a new prescription . . . until I got trifocals. Never did the bifocals, went from single focus to trifocal and walked around dizzy and with a headache for days. I have had them for about 4 years now, and am on my second pair but I still hate them. I have complained, changed doctors, changed labs and still can't see for sh--. I am just marking time until the doctor can find evidence of cataracts, then it is surgery and new eyes for me. He would do the surgery today, but insurance won't pay for it until he finds a cataract.