While we've focused on devices with two eyepieces here, some of today's best monoculars are also specialised for night viewing. Green having been chosen as a colour as our eyes are more sensitive to and capable of looking at for longer periods without getting tired. These devices work along the same principle of amplifying available light to provide an enhanced monochromatic image that's often green hued. They differ from today's best binoculars in that they're specifically geared towards use in low light. And yet, excitingly, there are consumer level versions available too, for those who want to spot otherwise skittish wildlife at night, or use for surveillance and security purposes.
The latter might be something we're perhaps more familiar seeing the army and special forces wearing in movies, while the former still feels like something from a sci-fi adventure.
