I visited my local allergist for this (in the USA). Basically the treatments available to me were either shots or eyedrops. The shots required visiting the office almost daily, then weekly, then less frequently. The eyedrops can be self administered. I was told both treatment options are not permanent and need to be basically done in perpetuity. The cost was a couple thousand dollars per year (basically no insurance coverage).
Seems like the treatment options are evolving pretty rapidly and these options aren't available everywhere. Or this is what I was told.
> I was told both treatment options are not permanent and need to be basically done in perpetuity
You were told wrong. Shots have a ramp-up period and then a five year maintenance period where you get one shot a month. Afterwards, you've effectively been cured.
A friend just started the shots and there was no ramp up, he's getting the shots every four to six weeks from the start. When I looked into it ten years ago, you had to come in weekly for a long time, which discouraged me from doing it.
Seems like the treatment options are evolving pretty rapidly and these options aren't available everywhere. Or this is what I was told.