What I do that works for my parasites I got from another member that doesn't seem to be here anymore.
When my eye parasites get to acting up, I use coconut oil and Dr. Christopher's Eyebright Eyewash. I use the coconut oil at night, and the eyewash in the morning to wash the dead stuff out. You'll be surprised what comes out of your eyes the first few nights. It's like this white, sandy gunk. Scary.