Well, yes, green tea will be good for people who have glaucoma. first, you should know that glaucoma is a kind of dangerous eye disease which, can lead to blindness. According to some researches, when it occurs, it comes like a silent thief, gradually stealing sight and usually providing no warning symptoms in the early stages. But on the other hand, when the disease progresses, damage to the optic nerve grows worse. Finally, side vision can gradually fail until there's only tunnel vision left. What is more, blindness can occur. And nowadays, some evidences have shown that green tea contains catechins which can reduce harmful oxidative stress in the eyes that is linked to glaucoma and other eye diseases. In that way, it can prevent glaucoma and be good for some people who have glaucoma. So just drink it everyday.