Marked cards contact lenses for sale
We also call infrared contact lenses as infrared contacts or luminous ink contact lenses. They are good to read invisible ink marked cards which has special invisible ink for playing cards.
People would rather choose marked cards contact lenses instead of invisible pen with glasses to read invisible ink. Because the tricks to do with a marked deck is hidden and secret. If you using marked playing cards with glasses in poker games, it will be obvious and easy to draw the attention from other poker players.