Unfortunately, if you are following us through “Optical Illusion of The Day” widget (those of you who missed it, be sure to get it here) you won’t see an animation – instead a static pic. This is a modification we’ve recently added to keep the apps stable.
Anyway, as simple and beautiful it is, this illusion clearly shows how CONTEXT plays a crucial role in our understanding of what we see. Can you force yourself to see the sequence as 12, B, 14 or A, 13, C instead? This is what Colin added to his submission:
I remember seeing this illusion many years ago at school. When the animated GIF plays, the B/13 in the centre remains exactly the same. It’s your brain who changes the context it’s seeing it in, and reads it differently – Colin