More and more people use contact lenses and its marked cards to cheat at poker games. If you feel that around you some one may use the contact lenses, and you are worry about be found by others, what should you do? Yes, we have better contact lenses / sunglasses with marked cards. This kind of marked cards can not be seen by red contact lenses, only can be seen by our blue contact lenses! It is very safe for you to cheat at the game. Nothing needs to be worried about. Also, the marked cards can not be seen by any camera lens.