As it pertains to aerial photography, stereo viewing in which the normal impression of relief is reversed.

What is pseudoscopic illusion?

Basically, pseudoscopic vision is three-dimensional vision in reverse. For example, in aerial photography, swimming pools appear to look like buildings and buildings appear to look like swimming pools.

How does a pseudoscope work?

The AstroMedia Pseudoscope has mirrors that swap the two images the eyes perceive. It also has one innovation that no other pseudoscope has had before: the two large mirrors can swivel on axles and therefore make it possible to adjust the focus for objects at different distances.