Key legal question
Whether the pension revision based on changed health circumstances was lawful.
Extracted holding
The medical evidence showed a relevant change: somatic deterioration, but no longer any psychiatric diagnosis affecting work capacity; the IV office and cantonal court could rely on the X.________ expert report.
Extracted reasoning
The court found no arbitrary fact-finding. The expert report met evidentiary requirements and outweighed the treating physicians' opinions, which were directed to treatment and not to a tailored substitute occupation.