Poker cheating glasses are a special pair of sunglasses that allows you to see the invisible marks on the backs of marked cards. It looks like any other pair sunglasses from the outside. It can also be used in poker games and magic shows. This lens is a secret because of its coating. It can absorb UV rays as well as infrared, and can allow you to see invisible marks.
It is a little weird to see poker players wearing sunglasses indoors, but I think there are a couple of reasons for it. One reason is that some people have light sensitivity and can’t play in bright light. I know someone who has this problem, and it’s logical for him to wear shades while playing poker. Another reason could be that it makes the players feel more safe psychologically. I know of a few poker players who were bullied or abused and find it comforting to use sunglasses while playing.
Some players use sunglasses to hide tells. I think this is wrong. Unless you are really good at hiding your body language, it’s impossible to hide every tell. It’s not a secret that most players use a few tells. Usually, these are small movements of the hands or something they say. I don’t know why people think wearing sunglasses to hide these tells will make them better players. It probably won’t.