If you add the digits of the number, you get 18. At 18 years is when someone is considered an adult by humans – the reason it's written it's a ' number of man'. Then he's given an identity card as an exhibit. Thus, the mark prophesied in the Bible is an ID. An ID takes someone's fingerprint and his face card. Therefore, the mark which is an ID will take right hard fingerprint which is a Divine identity code for humans and take his eye balls which are the windows to free will (intentions). This fulfills what's written – mark on the right hand and mark on the forehead. Humans are supposed to conquer it like a being and not reject it like an animal by using the eyes. Camera auto - focus has the tactic.