I had both of those symptoms frequently before I started parasite cleansing. I thought I was going blind. A big gray floater block the vision in one of my eye for several hours, then is would float away. It was scary. I also had the pulsing water rushing symptom in my ear drum numerous times. I don't have either one now that I've been parasite cleansing. I still have some small floaters and tinnitis.
I would encourage him to take Iodine. It will help, even if he chooses not to do the anti-parasiticals. And if he decides to go after the worms, the Iodine will make the dewormer work better.