Infrared contact lenses for marked cards is widely used in the poker game or magic show. It is a ripe products for many years. Only with the IR invisible ink pen contact lenses, you can read the invisible marks on marked playing cards clearly.
Different country people have different eye colors. In order not to change user eye color, there are many kinds of infrared marked cards contact lenses for sale, such as 4 mm colored area luminous contact lenses just cover the pupil, no matter what color of eyes, you can use this. And 7 and 9 mm colored area invisible ink contact lenses cover the iris, This is good for black eyed players.
We also can offer you blue luminous ink contact lenses for blue eyes. You just tell us what eye color you are, then we will suggest what marked playing cards contact lenses you use.