Nice little trick on the eyes here:

(Stare at the dot in the centre!)

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It is amazing.. Thx

Wow! omg, I had to watch it twice to make sure it was real..but wow!

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omg how clever

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Oh cool, I like that one!

Ha! thats insane

Hm, odd, when I showed it to my mum today she didn't see anything different. For her it went right back to black and white...!

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Did she move her eyes at all? Maybe it takes her eyes longer to create those negative coloured patches you get after looking at something a long time.

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We tried about 5 times. I made her look at it from various angles and all, and I told her to make sure to keep her vision sharp. Nothing :|

Edit: My brother does see it though

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That is weird. I actually thought I wouldn't be able to see it, lol 'cause I have weird funky dodgy eyes Sometimes I can't see things that others do, or sometimes I see things that you guys don't. Like dead people. Just kidding! :/ (I am very good with illusions though. They're fun! :D )

Are her eyes all normal? No vision problems? If not, that's strange.

She does wear specs but I wear contacts and so does my brother, and there's nothing else that's wrong with her eyes. At least, as far as we know :p

I never see half of those illusion thingies. There's this strange tetris version on the arcade I believe... I really can't see that.
Edit: hm well I can't find it now either. Unless my eyes just can't see the game itself anymore either, it must've been removed. Or it was a different forum.

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It was some version of tetris where the blocks could only be seen if you looked at them in a certain way... Really odd.

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it works even though im colorblind :P