Glasses to See Marked Playing Cards
According to the survey, there are a lot of poker-players have to wear the glasses as they are nearsighted. Most of them cannot work without glasses. So we produce a perspective glasses for them. The appearance of this perspective glasses is the same as normal glasses. The difference is that this kind of glasses can be used to read the luminous ink markings on the back of marked playing cards. The marked poker cards cannot be seen with our naked eyes but can be seen by our perspective luminous glasses. Perspective glasses not only can be used to detect whether other poker players use the same back marked cards as you, but also can be used in magic show of playing cards.