Seeing is believing. Or is it??

[MountainDon]

Here's an optical illusion. Look at the square with the A and the square with the B. A appears to be darker than B, right?



It's not. The 2 squares are actually the same shade of gray. I didn't believe it myself so I opened the image in Photoshop and copied a section from A and a section from B. I pasted the pieces into a new image and here it is. I enlarged the image by a factor of 2. No other tricks. It's all in your head.

[Sassy]

nawww, still doesn't seem possible!  :-?

[MountainDon]

Honest. The mind is a scary place!

[John Raabe]

It is hard to believe... We do like to trust our eyes (seeing is believing and all that ).

I enlarged the image and still couldn't see it. But - here are two selective patches copied into the same image.

[glenn kangiser]

If you squint your eyes real tight ---


to real tiny slits


so little light gets through


and stare at it for a few seconds


you can see that


the colors are


the


same.


8-)


Don't you think


other


people in


the room


watching you


do this


think


you look


real stupid?


Like--- what the hell is he/she on??

[MountainDon]

It's something to do with the brain recognizing the pattern and needing to make it work. That shadow gets it confused. Or something along those lines. Weird and cool.