Well, first, you should know that glaucoma actually is related to a group of diseases and it can cause damage to the optic nerve as a result of increased pressure within the eye. And also, according to some researches, a severe eye infection, injury, blocked blood vessels or inflammatory conditions of the eye can lead to glaucoma. To treat it, for example, you can try to use some lutein, which can improve visual function and it is effective to your situation. Also, drinking more water and eating fruits are also important. By the way, you can take daily supplements of eyebright, for eyebright can increase eyesight while combating cataracts and glaucoma. Besides, you should also eliminate stimulants from your diet that can aggravate glaucoma, such as caffeine, tobacco. anyway, just pay more attention to it.