The effort to dominate things visually fails, harming the eye in the process. The stress of digital writing breeds more than myopia. Because it is intensely interactive and yet nearly frictionless, computer work involves more prolonged strain than pencil or typewriter. You take fewer rest breaks. You have no paper file cabinets to visit, no corrections to make by hand, no variety of physical motions.
Fingers just keep moving, repeating the same keystrokes.
You hardly notice your unrelieved adaptation to the machine's specifications. The inflamed hand and arm tendons of RMS patients often require surgical operations, and doctors are finding permanent damage to bodily movement in many RMS patients. The word processor is not merely a glorified typewriter. The LA Times is finding RMS a serious problem among its employees. Even as you talk with a Times reporter over the telephone, you hear the constant clatter of her fingers taking notes as you talk.