This goes into sensory deprivation / control. With simple contact lenses, one could inhibit the eyesight of the wearer, or even make them completely blind. This, of course, can be taken further into high-tech stuff, by making the lenses displays. That way, someone else can control exactly what the wearer is actually seeing right now, without the wearer actually being able to look away, as they are directly on top of their eyeballs. More Details
Trip to the Edge of the Solar System by Shmabahamoha
Trip to the Edge of the Solar System by Shmabahamoha (Archive Link) This latex fetish story by Shmabahamoha was inspired by Karen – Lift Off by MonsterP63. The story follows Kathy and her long-term 20-year space trip to partially leave the solar system. Due to the extreme length of the mission, Kathy had to be equipped with some serious protective spacesuit so that she even would be able to survive an atmospheric entry outside the space-craft. The suit would protect her from basically everything, as well as keep her muscles stimulated during the long period of her journey. All her orifices were filled with tubes for medical needs, which were then inflated with a solidifying paste to keep them in place. Her entire head was covered, with ears plugged and eyes getting covered by small screens. Even her hands were properly encased in rigid balls. Kathy held controllers in the form of smaller balls inside her hands, so she could still properly handle everything. ...