I wore contact for about 37 years. I went to glasses for about a year because I needed new contacts and just didn't want to pay for them. When my glasses needed updated, I decided to switch back to contacts. My doctor gave me the choice between regular contacts with reading glasses or multi focal contacts. My previous contacts were regular ones. After a few days of getting adjusted to them, they worked great, for about a week. Since then, my right eye does not focus as sharply as my left. I notice in with my glasses on, but only when I close one eye. With my contacts, I see it all the time and much more so. When I returned for my two week check up, my doctor tried adjusting the power of the lens. That made no difference at all. It is to the point that I get headaches when wearing the contacts. My right eye feels like it is lazy. I tend to "flex" my forehead like when you try to focus. I see, overall, better with my glasses that were a couple notches below where they should be, prescription wise. I read that dry eye can be a cause of similar issues. I tried eye drops. There wasn't any noticeable improvement. I can just remain wearing glasses (especially after updating them), but I prefer the contacts for job related reasons. Has anyone have an idea of what may cause this? I'm looking at getting on opinion with a different doctor, but I'm sure the prescription is correct, since she checked it when I have the follow up.