Looking through a microscope for extended periods is not what we were designed for - it requires holding our bodies in an unnaturally rigid position. This can cause cramped muscles and strained tendons and ligaments in the head, neck, back, shoulders, arms and wrists, Also, repetitive movements associated with microscope work can cause strain injuries. There are specific health and safety regulations for computer use. Yet, you are tied much more to a microscope than to a computer, because of the eye-piece requirements.
Main problem - microscopists know how to align their microscope but few align themselves! Many users are “slumpers”, and need training to avoid problems later.