Capacity (unaided) ≠ Performance (with treatment)

Income-protection policies usually assess treated performance. Discrimination statutes often look at the unmitigated baseline. Mixing those axes is the mitigated-state trap.

Capacity (unaided)

WHO-ICF: what you can do without aids in a standard setting

Performance (with treatment)

WHO-ICF: what you actually do with treatment, aids, and environment

Why this matters for your claim — Assessors may treat the existence of treatment as proof of work capacity, or demand unaided function on a policy that tests the treated state.

Claim tip

Write both: function without current treatment, and function on the treatment you actually take — including side-effects.