Bionic vision

When we replace the simple lens as during cataract replacement surgery, we also run a gold wire to the oculomotor nerve, which the brain learns can receive signals from special invisible circuits in the new lens. Zoom to the microscopic, focus on the infrared, see around corners, “hear” vibrations on windows from conversations inside a room, the bionic eye replaces many bulky instruments, and you pay nothing for the brain power. You can’t see these devices by casual inspection, so the person who wears one has a secret advantage. The device can also communicate with a smartphone to overlay images on the field of view, which is useful even if you aren’t a spy.