Re:One more ? at end of my ramblings...Pork Tapeworms???

Hello shroom - the thing with parasites are that they can live ANYWHERE in the body - especially the microscopic ones. Single-cell protozoa (and fungi, and bacteria and viruses) can invade ANY single cell in the body - so if some of the buggers get into the eyes - well, hello floaters and blurry vision.

THEN AGAIN, all parasites produce toxins (from their urine, feces and naturally decaying bodies in OUR body) - these toxins irritate the Central Nervous System and can create a whole host of other neurological problems - including vision problems.