I am trying to find a source of the tea or eyedrops too. While my problem is not as severe as your sons, I also have floaters and an occasional feeling of a film over my eyes. Frankly, I would suggest you use the eyebright herb both internally and externally for a while. I've been reading your posts, but have not replied because this problem is far from what knowledge I have. Still, I pray you and your son will find the answers you need.