Most of us here keep/breed these animals because of our passion for them. It's always very painful when a beloved animal has a health issue - especially when its a gem like one of Will's jungles.
After reading your original post and then Will's reply, Im pretty sure that both Will and your vet are talking about the same condition. In my countless readings on snakes I can recall various accounts of eye infections caused by fluid blockage in the tear ducts. I can't ever remember hearing of it referred to as "glaucoma" in the snake world, but I'm pretty sure that what Will describes with the retic would be described as glaucoma by a vet or physician.
I read that it happens in many snakes, not just pythons and can be (but not always) triggered by retained eye scales. Did your snake shed properly last time?
Fluid retention, swelling, pressure build-up.... It all sounds like human glaucoma. I have heard that cannibis relieves the pain in human patients, perhaps it would for your snake too 
Seriously though, I really hope that your snake makes it through alright. It sounds like the snake is in great hands. You took it to a vet, you've sought help from experienced keepers on the forum even though its hard to admit your animal is having problems. It just sounds like you're doing everything you possibly can and you really care.
Im sure your snake will be fine and will grow up to be a true stunner! Now you just have to come up with a name for it like, "cylops" or something funny!
Best of luck with everything let us know how it turns out.
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- Joe Farah