Some are and some are not. Sometimes floaters just happen as the body ages - other times, pork tapeworm larvae are in there (they LOVE the head and eye area). Other parasites can also affect the eyes - generally if eye floaters go along with other symptoms of parasites - then it is probably parasites. If eye floaters are the ONLY symptom - then is usually is not. Sort of like "if the shoe fits".

Are you nearsighted? It happens very frequently in near sighted people. I have them in one eye and maybe one speck in my better eye. I am taking lutein but I've done a lot of reading and there's not much you can do to get rid of them. Actually, some people can make them invisible with the will of their minds and just ignore them.