Colloidal Platinum can be used in drops, to the eyes, or spray mist to the eyes. I called and talked to the Purest Colloids people. I have not tried the colloidal platinum myself, but the employees use it.
There was a reference to a colloid forum. I don't see it now. An airline pilot had eye floaters, and used drops of colloidal platinum, and had good results.
Search Colloid Forum, Google worked for me, then go to near the bottom of the forum, and there is a listing of ailments under Colloidal Platinum. There is a listing for Eye Floaters. There is an E-book available on Eye Floaters, seems a little hoakey, but might have some good info.