Cool Optical Illusion.

[NSXLuvr]

http://www.patmedia.net/marklevinson/cool/cool_illusion.html

 

[DutchBlackNsx]

wow, thats weird

 

[menuserve]

this has been posted a few times before

 

[Anosa]

What is the red line, about 4 pixels long under the 10 oclock positioned dot? does it serve a purpose in this illusion?

 

[fifrules]

I don't think the red line makes a difference because if you cover the line with your finger, the illusion still works.