Uhh stare at directly the plus sign with your right eye, don't move your eyeballs. Then try shifting your distance around. If you distance this correctly, the circle should vanish.
Super Mario Boards
Xiahou Dun
Marioro
Holy shit what
That made no sense
That made no sense
Xiahou Dun
You need to close your left eye btw, it's probably interfering with it. Close that.
Marioro
The plus covered the circle and the circle disappeared and that's what made no sense. Magic.