If there is no particular requirement, the color of the marked cards contacts lenses will be transparent with dark purple on the middle cheat software for superior poker. The dark purple area is the real function area for seeing invisible ink marks on the back of the playing cards. This area can be 9mm or 7mm. When you have special needs, the dark purple filter area can be narrowed.There are also quality standards for option. The standard contacts only has the reading infrared marking usage. The price is pretty cheap, which makes everyone could affordable. If you are ready to try this type of products, this would be your first option infrared contacts. Compare to the normal quality contacts, the professional quality infrared filter contacts is more comfortable for eyes, it can be used for longer time. It is normally be offered to the professional poker player.