Manual adderall? A fascinating, torturous device from a century ago, created by a sci-fi pioneer, the Isolator beautifully illustrates the hazards of single-minded focus, although it also would make a splendid fashion accessory. Via A Great Disorder:
These images are from the July, 1925 issue of “Science and Invention”, which was edited by Hugo Gernsback, who later became famous as a pioneer in the field of science fiction. He also invented this contraption which, to my mind, nicely illustrates the folly of taking an excessively narrow approach to solving a problem. The “Isolator” is designed to help focus the mind when reading or writing, not only by by eliminating all outside noise, but also by allowing just one line of text to be seen at a time through a horizontal slit. Obviously…this could be profoundly counterproductive: how would he know that his house was on fire -or, what if he dropped his pencil?