fungihw I think your eye doctor must be a floater! He was probably just bent that you knew more about it than he did.
After trying all the usual drops, coconut oil, Colloidal Silver , etc... I ended up using eye drops made with bee venom in them... yes it sounds crazy, but it helps kill off whatever is causing the irritation. It will burn at first then your eyes water- a bunch, but it flushes them out. They claim it helps with macular degeneration and can also be used as nasal drops: http://www.dancingbeeacres.com/servlet/the-Bee-Venom/Categories
Another thing I started using is kajal/kohl/surme... it's really like eyeliner but made with minerals and herbs that have been used medicinally and for parasites since... back in the day : ) I love it!
Some sources of the product may contain lead, but, "In January 2010, French researchers have reported that the particular heavy eye makeup that ancient Egyptians wore may actually have had medical benefits. At low levels, the specially made lead compounds actually helped the immune system by stimulating production of nitric oxide."
The FDA does ~not~ approve, so you know what that means!