I just finished listening to a CD from Dr. Lorraine Day called "I SEE" and she was discussing how to naturally cure Glaucoma as well as other eye problems like Cataracts and Macular Degeneration. Check out her website http://www.drday.com/
She also mentioned not drinking enough water can be one of the problems. She suggests 10 glasses of water a day or more. Also if you have high blood pressure, it's one of the causes for Glaucoma.