Marked cards with contact lenses

Our company three kinds of marked cards with contact lenses that can be used to see printable deck of playing cards on invisible marked card backs: marked playing cards contact lenses, UV contact lenses and luminous ink contact lenses.
Here are the details that the three kinds of marked playing cards contact lenses have in common. All of the high quality professional poker contact lenses are made of high-quality HEMA with water content of 42%. The center thickness is 0.04mm and the base curve is 8.6mm, which are very comfort and soft for you to wear in games.
The most important is that there has the different size of center diameter of marked cards contact lenses, which will not change your eyes color if you choose the right one.