Luminous ink contact lenses

Luminous ink contact lenses can view marked cards in magic games. We apply white light principle to regular contact lenses so that they can see marked cards decks.

But normal contact lenses cannot see invisible ink markings on the marked cards as well as playing cards. We also have another type of gamble x ray contact lenses read regular playing cards and invisible ink marked cards. What is more, the price of luminous ink contact lenses is different from x ray vision contact lenses.