You don't let the eyes go bad, they are slow to recover from such things.
I suggest he reads the 108 pages and the entire web site and if able to read BOOK I and do the study guide, I believe once he educates him self that "IF" he wants to live well, he will change his ways and seek being wormfree. "IF" he does not like life, then his mind will slowly make life more and more misserable for him to exist. It is time to re-educate and deside to live, thats the idea for this forum.
He would feel much better about life if the worms were gone and minerals made available and wrong foods/drinks stoped as well as video games/tv/elctronics. If you read BOOK II it gives allot of clues as to why children born after 1992 have a hard way to go and why we all have a hard way yo go.