My close vision has pretty much crapped out on me, but with a wide V- there are no multiple 'edges or lines' and no tight fuzzy U or V notch with multiples of lines above the bottom one.
The front bead is fuzzy as well, but the target for me is sharp due to my distant vision upper lens on my bi-focal spectacles.
The bead is fuzzy, yes - but - I know the ball hits in the middle of that ball of fuz - thus, I am still able to shoot half decently - sometimes. I do not get along with V or U notches, although currently, those the sights on my squirrel rifle, but sometimes they do shoot OK. I think that is due to some beneficial light conditions that only rarely occur. LOL
I will have to change them out for wide V and bead some time soon - before I seriously start testing loads in it. The V rear and blade front are just too difficult for me to see any more. If the barrel was 48" long, like on my Verner, I might be able to see the blade. They Verner has wide V and bead already & is fun to shoot.