I wear glasses, and I can see the 28mm Framelines on my .58 bodies at least as well as I can see the 35mm framelines on my .72 bodies. Which is to say that I with my eye held centered, I don't see all the way to the corners; but I can see the edges well enough to line up the verticals in an architectural shot. And if I have time to shift my eye just a little, I can see out to the corners.
So the .58 finder is quite useable with glasses with the 28mm lens.