Which personnel is permitted to administer the near-distance vision acuity examination using the Jaeger Letters?

The correct choice is based on the fact that an NDT Level III has the required qualifications, experience, and authority to conduct specialized examinations, including the near-distance vision acuity test using Jaeger Letters. NDT Level III personnel are considered experts in the field and are responsible for overseeing the implementation of test procedures, evaluating the effectiveness of non-destructive testing techniques, and ensuring compliance with relevant standards.

Individuals at lower levels such as NDT Level I or NDT Level II do not possess the necessary authority or depth of knowledge to perform this specific task independently. Supervisors, while they might have experience, are not always qualified under specific certification standards to administer technical examinations on behalf of the organization unless they themselves hold the necessary certification. Thus, the NDT Level III's expertise solidifies why they are specifically the personnel authorized to administer this vision acuity examination.