Optical Illusion

[silent ben]

I'm going to guess the pink dots fade out due to the grey and pink being of the same intensity, also the B&W part of the eye causes fading if you dont move your gaze. Staring at the centre dot causes only the B&W part of the retina able to see the pink dots, and without colour the dots fade into the background due to being the same intensity.

The green dot appears because the picture moves in steps (12 steps in all), when one of the pink dots dissapears, your eye sees something has changed, and tries to estimate its colour from the surroundings. Just so happens on this pic it gives you a green dot.

Theres the biology, now prove me wrong

[JK Ferret]

If you stare at anything that is surrounded in one colour (i.e. a dash af white in pitch black) it will eventually fade to the same colour as its bacjground.

Strange. probably to do with your eye's 'blind spot' or something like that.

EDIT: Maybe because i never have to do an Englush lesson again, i seem to have forgotten how to spell. what a jackass i am.

PS: I'm back. Again.