brain game

this crazy effect  happens because your  eyes don't  have  strong image to latch  on to. The narrow heavily  contrasting lines contrasting lines contrasting  lines confuse the ways your  eyes  see the bright  and dark areas. The  why your brain struggles to  understand the scene and why you see a flickering shimmering picture. more your eyes around this image to it shimmer just not for too long eyes your eyes might  get tried. from called national geographic kids .