#185 : Centre Bulge?

There are many different types of illusion. Physical illusions are illusions where something has happened before the light reaches the eye, such as a rainbow. Physiological illusions are the effects on the brain by stimulation of a specific type such as brightness, colour and movement. Visual cognitive illusions are those that go against what we perceive as logic, and can continue to confuse us even when we know the trick.

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?