Eye floaters are usually small flecks of collagen, the floating inside of your eye (the same subtancesubstance that is present in the extra-cellular matrix,) and as you age they can clump together and cast shadows on your retina. They may look like microbes to you because, as mentioned earlier, they are made up of collagen fibers clumped together which the clumping gives the apperanceappearance of a thread-like or rod shape, commonly associated with microbes also the. The light falling on the eye will enhance this by making them look transparent and somewhat like microbes.But But rest assured they aren't, because if they are, then you certainly have superhuman eyes!