and if you don't need glasses but suddenly everything seems blurry - that's the first place to check! I've seen several cameras with that diopter cranked to one extreme or another rendering the viewfinder pretty bad.
I don't wear glasses. So I should just leave it in the middle there huh?
I'm thinking of getting one of those viewfinder extensions. My big nose rubs up on the display. hehe You guys use one of these?
It depends, do you see the three boxes in the view finder clearly? If not use it to adjust to your eyes. I don't wear glasses either but I adjusted it.