Key legal question
Whether the refusal to increase the half disability pension to a full pension was unlawful.
Extracted holding
The refusal was lawful because no relevant deterioration in health or earning capacity was proven, and the invalidity assessment was not arbitrary.
Extracted reasoning
The evidence did not objectively show a worsening; the expert still considered the former 50% laboratory work reasonable, and the cantonal court could rely on a 50% residual earning capacity with no additional deduction from the statistical wage.