The reason why a majority of poker players use infrared contact lenses is that this poker cheat device is quite easy to use in poker game. Just only wear suitable invisible ink infrared contact lenses; you can see the markings on the back of invisible ink marked playing cards in advance. These contact lenses will not harm your eyes because we adopt the eco-friendly and safe material to make it. Besides, there are different color contact lenses for different color eyes, you can choose suitable color one according to your needs. When you wearing our contact lenses, other players is hard to find you are wearing the magic contact lenses. You can wear them in anywhere.