Where can I buy contact lenses that can see invisible ink?
People are familiar with contact lenses. Because contact lenses can bring you clear visibility effect if you are short sight. But do you know infrared contact lenses for marked cards? How much do you know about infrared contact lenses that can see invisible ink marked cards?
Infrared contact lenses are processed with original lenses but remain the same appearance as common one. According to white light principle, this kind of marked cards contact lenses can see luminous invisible ink marks. And invisible ink marks backside marked decks are only could be seen through by infrared contact lenses. Therefore, these infrared contact lenses also called one to one marked cards contact lenses.