Isometric illusion

From Psychology Wiki

An isometric illusion (also called an ambiguous figure or inside/outside illusion) is a type of optical illusion, specifically of multistable perception. In the example figure at right, the shape can be perceived as either an inside or an outside corner. In general, any shape built entirely of same-length (i.e., isometric) lines that does not clearly indicate relative direction between its components will evoke such a perceptual "flip-flopping".

The Necker cube is a famous example of an isometric illusion.

This page uses content from the English-language version of Wikipedia. The original article was at Isometric illusion. The list of authors can be seen in the page history. As with Psychology Wiki, the text of Wikipedia is available under the GNU Free Documentation License.