Hello, Dr. Rick. Mega doses of vitamins do not seem to make a noticeable difference. Certainly the general health of the patient, especially older patients, is crucial to resisting the deleterious effects of glaucoma.
Nutrition plays a role in that.
Theoretically, Vitamin E can improve the optic nerve's ability to resist intraocular pressure, but this has not been proven in human beings. I have increased my salt intake, but don't know how much to take. Dr. Selim Orgul of Switzerland recommends starting with one gram of salt at bedtime and increasing to up to three times per day. You should not drink three glasses in an hour unless you are dehydrated. Increasing the zinc intake will displace copper, and may be harmful.