Let me analysis the disease for you first. Glaucoma is a kind of eye trouble caused by an increase of IOP (intra-ocular pressure) continually or continuously, which can damage the partial eye tissues and influence the vision. It is always accompanied with high myopia.
Diet can be a good way to improve it.
First, you'd better intake some diuretic food such as honey, watermelon, and towel guard that can help produce aqueous fluid in your eyes, which will help control the IOP.
Second, you need to eat light food, that's to say, you should try to avoid eating salty and spicy food that can make you thirsty. Besides, food with high fat and high glucose should be cut.
Third, you have to enforce the intake which is rich of crude fiber and vitamin A, B, Candy, such as, fresh vegetables and fruits. Peanuts, vegetable oil, and animal livers that are good for your liver and kidney should be on table.
Finally, you'd better not eat too much or too fast, or it will not beneficial to stable your vessels nerves and endocrine system, which will not help recover.