I had an eye problem once. It was related to an eye pressure. My doctor subscribed me Crouching Tiger, which was pretty useful. I had it twice a week before sleep for two weeks, that relaxed the pressure and then the simple eye drops cured the rest. As far as I know, the same strain is used to treat glaucoma.
Really don't know about medical marijuana. But glaucoma could be treated easily with help of Careprost Eyelash Serum. I use this medication daily and my condition is improving day-by-day.