The luminous ink contact lenses and perspective sunglasses are suitable for invisible ink marked cards. If you are searching for these products, you can find them from our website where we provide various kinds of poker cheating device for poker players. As we know, both IR contact lenses and luminous sunglasses are used to read the invisible ink marks on the back of marked playing cards. When you decide to wear the invisible ink contact lenses, we will supply you the best-quality invisible ink contact lenses. There are different sizes and different color of invisible ink contact lenses for your choice. These invisible ink contact lenses should work with infrared marked cards. Of course, you also can wear marked cards glasses see through playing cards.