Yes, night-vision goggles really work. They let you see objects in total darkness, even if those objects are football fields ahead of you. Night-vision goggles work by converting the small amount of light photons that are present at night into electrical current and amplifying those electrons before converting them back into visible light. Thermal goggles detect heat energy, letting you see the shapes of images, even in situations where there truly is no light—like in a smoky building. Night-vision goggles cannot see through walls, however. And the majority are not built for daytime use—doing so can cause internal and external damage to the NVR.