I don’t know a lot about it, but I don’t think all glaucoma is an “old people’s disease” or is caused by the same thing. My personal experience is that my acute angle glaucoma was diagnosed when I was in my 40’s. I did not have any episode. Just a routine visit to the opth. alerted my condition to that doctor. I guess my pressure was a little high or something. Anyway, mine is caused by the shape and size of my eyeball, which blocked the proper drainage of fluid. The solution was a simple laser surgery to poke new drainage holes in a different area of my eye. So far, that seems to have fixed the issue.