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When I look around, especially when its a plain blackground, i see little bacteria like things floating in from of me. Some of the things are long and striny, with a bunch of segments, and others are really small and are kinda tadpole shaped and move around, and some are just dots. When I turn my eyes, the things kinda slosh around in my field of vision. Is this normal?

It kinda looks like this: http://www.depts.ttu.edu/hillcountry/research/images/mscope images/bacteria and filamentous alga.jpg