My 35 yard parallaxed scope tends to be blurry at extreme close range, sorta unusable at under 5, acceptable at about 8 yards, pretty decent at 15, then increasingly clear up to 35, then after that, almost as clear out to Fort Mudge and beyond.

There's some houses 1/4 mile away across a field from my place, and even those are in pretty good focus.
However, my eyes are young eyes, so mine can do a lot of extra focusing work that older eyes might not be able to.