‘And then the troops, unnoticed, surrounded whole of the desert city in that dark night, which certainly was all green for them’, we must have come across such lines in some or other war related article. Well, as quite a number of people do know that what does the word “green” here refers to, very few are able to tell the deep insights about it. This article takes every inch of that green and explains its cause, the night vision technology. Night vision technology, as the name suggests, is the expertise that makes us capable to see in the night without using any external light source such as a torch or a lamp. Highly advanced light sensitive cameras are used in this technology that produce clear visible images at night which the naked eye can’t do.