Yeah, I've got the small ones like in that picture shown. I developed them about a year or two ago. I noticed them a lot, like you said, when looking at bright backgrounds, like the sky or in the shower. Unfortunately now I see them all the time. Such as this web site, using the Nightshade theme. The grey is light enough for me to notice them. It is so hard to ignore them. Plus mine move around; they aren't in one location.
However this one I have in my left eye is big, like it is either further in my eye or just really large because I cannot make out the object's size, edge, or whatever.
My mom has these too. I hate my eyes. I'm badly nearsighted (almost a -8 diaopter in both eyes) with really bad astigmatisms. Plus I have a bad spot on the bottom of my retina in one eye, that my eye doctor found at my last appointment that she said would have to be monitored at each appointment to make sure it hasn't gotten bigger.
I need new eyes. Anyone care to give me their eyes?