Category: Afterimages | Date Added: November 18, 2009 | 37 comment(s)
Try staring at the dot in the center of this image, after a time the grey area around the dot will seem to shrink and disappear.


Image credit: This image is believed to be in the public domain.


Category: Shape and Color | Date Added: November 7, 2009 | 11 comment(s)
This cafe found in Bristol at the bottom of St Michael's Hill features an elaborate wall design. The black and white pattern uses straight horizontal lines however to the observer the lines appear to the bent.


Image credit: Wikipedia, CC 3.0


Category: Double Meanings | Date Added: October 31, 2009 | 22 comment(s)
Here's a spooky illusion just in time for Halloween. What do you see in this picture, a profile of Salvafor Dali or a ghostly woman ?


Image credit: This image is believed to be in the public domain.


Category: Impossible Objects | Date Added: October 24, 2009 | 17 comment(s)
This well used optical illusion also sometimes referred to as a "blivet" is an impossible shape consisting of three prongs but with only two connecting segments.


Image credit: This image is believed to be in the public domain.


Category: Shape and Color | Date Added: October 20, 2009 | 30 comment(s)
This repeating pattern of an orthinological variety contains a number of birds - but exactly how many of each colour are there ?


Image credit: This image is believed to be in the public domain.