Eye Twisters

This Illustrates That
Our senses cannot always be trusted.
Our mind is the final arbiter of truth.

Warped Square?
There are no curved lines in this figure.


Rotating Wheels
The circles appear to rotate when you move your head closer and further away from the screen while looking at the dot in the center.


Wavy Squares? No!
The background of concentric circles makes the squares appear distorted.



There are only white circles at the intersections



The center circles are both the same size.



There are no gray spots at the corners of the squares.


The diagonal lines are parallel.


The red squares are the same color
in the upper part and in the lower part of the "X"

Perpetually ascending staircase.
How can the man go up all the time and come back to the same place over and over?

So never make a decision based on your observations