You'd be surprised at how realistic they can be. My most effective clarity technique is to stop what I'm doing and stare at my hands for a little bit. They come into focus to where I can see my fingerprints, and even they sometimes magnify into deep crevices. Usually, after I've grounded myself, I will lower my hands and look around. Everything that used to be a blur, when I was initially dreaming, suddenly comes into hi-definition. It's amazing; not a blur or blemish, just complete, visual perfection. It's hard not to just stand there and stare, in awe, sometimes.