Case C-824/19, Disability discrimination

Does the interpretation of Article 5(2) of the United Nations Convention on the Rights of Persons with Disabilities and of Article [2](1), (2) and (3) and Article 4(1) of Council Directive 2000/78/EC of 27 November 2000 establishing a general framework for equal treatment in employment and occupation lead to the conclusion that it is permissible for a person without the ability to see to be able to work as a court assessor and participate in criminal proceedings, or:
Is the specific disability of a permanently blind person a characteristic which constitutes a genuine and determining requirement of the activity of a court assessor, the existence of which justifies a difference of treatment and does not constitute discrimination based on the characteristic of ‘disability’?