The marked cards infrared contact lenses (also called luminous readers contact lenses or invisible ink contact lenses) are a special kind of cheating lens which helps poker players see the invisible marks on the back of the playing cards clearly. These lenses also allow the wearer to see their surroundings and opponents. These contact lenses have the advantage that they maintain the original eye colour and are safe to use. However, it is necessary to soak them in pure water rather than care solution in order to use them for a long time.
This type of contact lens has a small UV filter. After the infrared passes through this mini UV filter, it becomes visible to human eyes and we can read the invisible mark on the cards. These filters can be used with both plastic and printed playing cards.
The story of the successful cheating scheme has all the ingredients of a Hollywood blockbuster, including high-tech lenses, marked playing cards, corrupt casino staff and the French Riviera. A 56-yearold Italian codenamed Parmesan won 70,000 Euros in one poker session, and then another 21,000 Euros the next. He and two casino workers who were his accomplices used a secret method to mark the cards in invisible ink, which only they could see. Then, they used a set luminous reading contact lenses to reveal the values and suits of the hidden markings. State police caught them.