According to Rudolf Koch, the Dragon's Eye is an ancient Germanic symbol.
[1] According to Carl G. Liungman's Dictionary of Symbols, it combines the triangle meaning "threat" and the "Y" meaning a choice between good and evil.
[2] The dragon's eye resembles a two dimensional projection of a tetrahedron viewed from directly above one of its vertices.
The shape has been incorporated in the logo for the video game Ingress since its original public release in 2013.
[4] The Dragon's Eye is also found in the Destiny series of video games, associated with the character Ikora Rey.