#145 : Same Greys?

An optical illusion, or visual illusion is characterised by visually perceived images that differ from objective reality. What does this mean? Basically your eyes see one thing, and your brain 'sees' something else. The information that your eyes feed back to the brain has to be understood by the brain, and the brain is very clever at guessing what it should be seeing and sometimes this difference can be quite astounding.

Our Favourites

Shadow Illusion Are the squares A and B the same colour?   Spinning Dancer Which way is the dancer spinning?   Impossible Waterfall? Is the water flowing uphill in this impossible waterfall?   The Butterfly A colourful butterfly?

Duck Or Rabbit? Is this a duck or a rabbit?   Hidden Faces Can you find his three daughters as well?   Blind Spot An amazing demonstration of your blind spot.   Impossible Prongs? Impossible prongs?

What Am I? Can you tell what this is a picture of?   Who Turned To? Who is missing?   Same Eyes? Are her eyes the same colour?   Parallel Cafe Wall Lines? Are the horizontal lines parallel?