Do you have a little black dot that disappears and reappears in one of your eyes at random? Do you assume it a bit of dirt or dust when you see it and rub your eye or try to fish it out with your fingers to no avail? If so, stop; the black dot is not dust or dirt or any other particle on the surface your eye -- it's a floater, and you're going to damage your eye even more if you keep trying to remove it.
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