They are called Reversing Goggles, the party looks to wear masks at work to cover the eyes with the big difference that they have two prisms that emerge before our eyes.
Are these prisms to create the "magic", which actually has very little magic because it is a year-end scientific and cleverly exploits the properties of prisms.
When you look wearing these glasses you see the world upside down, as if you were upside down. Actually you will see the world as we perceive the eyes, which project the image on the retina at the back, then your brain to turn it over and give us a correct view. These glasses topple the image, tricking the brain that flips it and makes us see the world upside down.
But these glasses are not only this fact, you can just rotate the prisms of 90° to change the visual appearance and see the right and left reversed. Basically, your brain will think they see what the eye sees the left to right and vice versa.
A very complex situation to deal with moving, much more difficult than to have the world upside down.
Obviously there are glasses to be worn with caution and use only for testing of new sensations and emotions, needless to say that one should not make sudden movements, running or doing complex tasks wearing the Reversing Goggles.
Since everyone is different you will find a kit with the glasses and prisms to direct him to small changes so that you can mold them to perfection with your features.
Find them on grand-illusions.com
