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The black dot
Category: Afterimages | Added: November 18, 2009 | 38 comments
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.

The black dot
Image Credit: This image is believed to be in the public domain.

Cafe Wall Illusion
Category: Shape and Color | Added: November 7, 2009 | 11 comments
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.

Cafe Wall Illusion
Image Credit: Wikipedia, CC 3.0

Salvador Dali Illusion
Category: Double Meanings | Added: October 31, 2009 | 22 comments
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 ?

Salvador Dali Illusion
Image Credit: This image is believed to be in the public domain.

Impossible Trident Illusion
Category: Impossible Objects | Added: October 24, 2009 | 18 comments
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.

Impossible Trident Illusion
Image Credit: This image is believed to be in the public domain.

Birds Illusion
Category: Shape and Color | Added: October 20, 2009 | 31 comments
This repeating pattern of an orthinological variety contains a number of birds - but exactly how many of each colour are there ?

Birds Illusion
Image Credit: This image is believed to be in the public domain.

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