Sharon,
the oral glycerin is something my vet had me do with Rags. We had to keep the pressure down. Now, it's also something that should be done per vet instructions... as it can cause rebound issues. The eye specialists also have something like that, IV Mannitol, but with Rags we tossed the kitchen sink at him in the beginning. His was so bad we HAD to relieve the pressure immediately and keep it down for a bit.
Eventually we did take the eye, but he needed to be healthy and more stable before that surgery, because we did a neuter and a hernia repair at same time. It eventually went to the other eye and Nancy had that eye removed.
If you look up Glaucoma and Glycerin - you might find some info, but I don't advise you doing it yourself, without your vets knowledge. My vet has taught me so much because he knows me and that rescue knows the red flags and sometimes we treat the smaller things ourselves, so he keeps me pretty well stocked up on some meds, etc that should be in our hands if need be.
I have also learned several things from a rescue I used to foster for. We are not vets and can't play vets on TV, but we can certainly learn from our vets and other rescues that have had good success with certain protocols.
Sometimes a vet and an eye specialist have different opinions on things. Vet knows the eye will go eventually, and that we can't afford to mess around, specialist wants to save it if possible. So, most times rescue realizes that the pups don't need the eye and have it either killed or removed, depends on funds and whats best for dog and getting them pain free and adopted without more issues down the road.
Of course doing your research is important, but also, discuss with vet.
