Same Length?

Illusion #190 : Are the vertical and horizontal lines the same length? Click the image to see - JavaScript Required.

An optical illusion can often be the difference between the real world and what the eye and brain together 'see'. The information gathered by the eye is passed to the brain and can be interpreted incorrectly, particularly where sizes are concerned as we are not always good at judging lengths (or colours).

My Favourites

Shadow Illusion Are 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?