Glaucoma And Medical Cannabis?

Have you guys ever tried using cannabis for medical purposes? I have been diagnosed with glaucoma for almost a year now and I've been searching any alternative medicine that can help me then i came across this article that says marijuana can be used to treat and prevent glaucoma. I've been planning to try this kind of strain here in http://www.ilovegrowingmarijuana.com/white-walrus/ but i have no idea where to start or buy. Can you guys give me any tips or any ideas that can help me? Thank you!