So when the chemicals no longer control the high pressure, (or loss of fields is apparent) there are two possible treatments.
1. small holes "drilled" by laser to drop the pressure, which will be effective for 6 to 18 months, but can be repeated.
2. trabuculectomy (spelling may be off), a leaky flap in the eye.
Anyone know at which point the CAA will call it a day for you?