are an American novelty item, purported to allow the user to see through or into solid objects. In reality the glasses merely create an optical illusion; no X-rays are involved. The current version is sold under the name X-Ray Spex; an essentially identical product is sold under the name X-Ray Gogs.
X-Ray Specs were long advertised with the slogan "See the bones in your hand, see through clothes!" Some versions of the advertisement featured an illustration of a young man using the X-Ray Specs to examine the bones in his hand while a fully dressed woman stood in the background, as though awaiting her turn to be "X-rayed."
X-Ray Specs consist of an outsized pair of glasses with plastic frames and white cardboard "lenses" printed with concentric red circles, and emblazoned with the legend "X-RAY VISION". Viewing the "bones" of a hand through X-Ray Specs. The lenses consist of two layers of cardboard with a small hole about 6 mm in diameter punched through both layers. The user views objects through the holes. A feather is embedded between the layers of each lens. The vanes of the feathers are so close together that light is diffracted, causing the user to receive two slightly offset images.