Optical illusions commonly go after your mind's capacity to fill in spaces in the visual boost it is accepting. At times this could be solid, your brain keeps on being deceived much after it has been clarified. For example: this feature from brusspup, purveyor of brain softening illusions.

The feature resembles a wheel made out of eight white loops is moving around within an extensive, red round. That is not what is really happening, as the feature will clarify: