Ok,

So,

Let's say, I have a 4th Nerve Palsy which is causing a torsional
diplopia. My fusional amplitudes are pretty good and I converge the
images correctly most of the time, unless I go for those dissociation
tests such as W4D and Maddox, but every now and again in the real world,
I begin to decompensate.

Now, would any prism glasses help with the decompensation, or would
prism glasses help all the time to relieve any mental/physical strain
with having to compensate all the time (if indeed that's what Im doing)?

Am I getting a hang of these things now? Think I finally understand it.

Ta
Simon