UV Invisible Ink Contact Lenses for Marked Poker Cards

How to read poker cards marked with invisible ink You may have heard of UV contact lenses. A special type of mark card contact lens that can read the mark of playing cards within 3m. Just like regular contact lenses, they do not change your original eye color. Additionally, compared to sunglasses, UV contact lenses are more opaque and flexible.

There are three classes of ES for the quality of UV contact lenses. Not enough. Second-class and top-class contact lenses have different eye colors, and both can read cards clearly.

Generally speaking, grade 2 contact lenses can last over 8 months, and the best quality contact lenses can last over 2 years if properly stored in pure water.

For nearsighted people, we also have special contact lenses for nearsightedness. The most important thing we should pay more attention to is the storage method. Soak the lens in pure water, not the care solution.