Key legal question
Whether the conditions for revising the half disability pension under Art. 17 LPGA were met due to an alleged deterioration in health.
Extracted holding
No proven deterioration of health was shown; the requirements for revision were not met.
Extracted reasoning
The later medical opinions did not establish a relevant worsening, but mainly reflected a different medical assessment. The new complaints were either marginal or already accounted for in the earlier file.