I think there is quite a difference between the procedure you had, Jeff (which is extensive) and a simple laser tacking of a detachment. In your case, putting gas into the eye means there are SIGNIFICANT implications of pressure changes, whereas in the normal eye, which is fluid-filled, pressure equalizes automatically through the orb and there are no differentials across the sclera.
With regards to the mask squeeze, I think it's unlikely someone would tolerate enough mask squeeze to deform the orb itself. But again, the surgeon who is doing the procedure should be aware of the mild pressure differential that can occur across a mask, and his advice is what you should heed.