What kinds of marked cards kit you will choose for see marked deck cards? Maybe a invisible ink pen contact lenses for playing cards is a good choice.
Accordance with the principle of filter and processed with the best quality material, the invisible ink contact lenses that can see through playing cards can concealable after you wearing them, and others cannot find any difference. No matter what color your eyes are, there are various luminous ink marked cards contact lenses for your choice. Such as marked playing cards contact lenses for blue eyes, infrared contact lenses for grey eyes, UV contact lenses for black eyes, invisible ink pen contact lenses for green eyes and so on.
All of these magic marked cards contact lenses can help you to read the concealable invisible ink marking marked on the back marked playing cards easily and safely.