Continuous Flash Suppression

https://www.youtube.com/watch?v=w6jiJQ1FcZM https://en.wikipedia.org/wiki/Continuous_flash_suppression

In CFS, the first eye is presented with a static stimulus, such as a schematic face, while the second eye is presented with a series of rapidly changing stimuli. The result is the static stimulus becomes consciously repressed by the stimuli presented in the second eye.