Floaters are pieces of vitreous humor that have broken away from the retina as I remember. No cure for it and big ones can be a sign of bad things to come. I have some of those bad things coming. Tuesday of next week I get a partial cornea transplant and a cataract removed. after that one heals (if it does and doesn't reject) I get the other eye done. My floaters are sometimes a long thing like a worm, often coiled up like a snake (which is when it covered the heli) and sometimes it takes other shapes. I only see it looking at a bright background (like the sky with no clouds or a computer screen with a mostly white background.) Sunglasses have helped somewhat but it still makes me a little apprehensive when flying something that could cut your head almost off. Take care but have fun!