The prostaglandin class of eye meds don't work for me--nerve damage continued and the pressure did not go down by much. I refused surgery and any other class of medications.
After several years of trying every alternative treatment I could find, I finally have had success in lowering the intra-occular pressure with diet, exercise and frankincense. I used supplements for years without noticeable difference in pressure, but once I started following Dr. Benjamin Lane's diet and exercise recommendations and using Frankincense, improvement was substantial. I cannot tell you for sure which of the three helped the most but I had used the exercise and diet for three months before receiving good news, and the frankincense for just a few weeks. You can find info on Dr. Lane's diet with a google search (or start with http://www.mothernature.com/l/Preventions-Healing-with-Vitamins/Glaucoma_971.html) and instructions for using food grade (therapeutic) frankincense at http://younglivingforum.com/viewtopic.php?f=3&t=841.
Re the diet: I did not add any supplements to the ones I have been taking for years which include D, Co-q10, C, O-3, E and a special eye formula that includes G. Biloba et.al. I walk for 45 minutes EVERY DAY. I eat organic meats and mostly raw vegetables and fruits. I eat NO processed foods--flour, sugar, pasta, etc. I drink no caffeine and no alcohol.
Doesn't sound like much fun to you? Yeah, but I want to keep my sight and for me, that's a big enough motivation.