The lenses that are specialized in reading the marks of the playing cards are the infrared contact lenses. You can’t see the marks neither with a naked eye, nor with other contact lenses. In this way they are the best cheating tool for games such as Texas Hold’Em.
Produced thanks to the newest technology, these are the lenses with which you will be able to see the invisible ink on the back of the cards. The UV lenses, for example, won’t give you the possibility to see the marks, as the technology used for the UV and the IR contact lenses is different.
The IR contact lenses won’t change the color of your eyes. Also, these lenses won’t harm your eyes, even after hours. The light you are under doesn’t matter as well – yellow, white or red, the clarity of the marks will be the same.