I thought it was just a passing thing at the range when with my glasses things got fuzzy. Take them off sights are clear it's just that the target better be big. Not wanted to choose I'm going to the eye doctor Thursday, anyone had a similar situation and if so what did you tell the Doc?
Maybe " fuzzy" wasn't the most descriptive choice, what is more appropriate is lack of definition . Glasses off sights can be lined up, but the target becomes somewhat an amorphous mass. With glasses on target can be seen but can't line up the sights.
I had a similar issue with driving in rain. I'm nearsighted and my eyes would autofocus on rain hitting my windshield while I drove. As it turns out, I just needed a new prescription since my vision had changed. Hopefully your problem is just as minor as mine was.
Sounds like creeping near-sightedness. But don't take assumptions into the eye doctor's office. Doctors hate webMD self-diagnosers. Just describe your symptoms in as much detail as possible, answer the doc's questions clearly, and let him or her figure it out.