X-ray glasses

X-ray glasses are devices that enables one to see through solid matter at varying levels. Largely, such devices are fraudulent gags that one might find in a comic book advertizement from the 1950s, or at a novelty shop. In some cases however, there are situation where genuine x-ray glasses, or similar devices, have been produced.

In DC Comics, Professor Emil Hamilton designed a pair of actual x-ray glasses, which he gave to Superboy. These served as an analog to Superman's x-ray vision. Of course with Superboy, being a horny teenager, you know what he used them for.