Thank you for answering additional questions.  Does your following edit explain that the actual demonstrations occurred at his worksite (office) while (or during) observing the products and the type of his work?
 
I went to the site and observed with MK a demonstration of Enhanced Visions products in MKs work environment. MKs counselor, NJ, referred him for an evaluation of the option of using a CCTV (or a video magnifier) after a representative from demonstrated the companys products.