Dr. N. Gregory Richardson, Optometrist
Illusions I

The Doc
Eye Exams
Fun Stuff


             illusion_dog.gif (9408 bytes)

What is this a picture of?

What is an Optical Illusion?

We see an optical illusion when the signals sent by our eyes to our brain are misinterpreted.   Our eyes only send data, bits of electrical energy.  The brain  uses our past experiences to understand  and recognize the data as an image.   Sometimes certain images trick our brain into seeing something that is not quite there.  We hope you enjoy fooling your brain with these optical illusions!

Is this an old woman or a young woman?  Or is it both!



Even when your brain is sent this "spotty" information, it can usually interpret it.

More Fun Stuff!

Illusions I
Illusions II
Weird Eyes I
Weird Eyes II
Weird Eyes III
Comics I
Comics II


Dr. Richardson
475 Yellowstone, "G"
Pocatello ID 83201
(208) 233-1551

Illusion_Imposs_instruc.gif (6036 bytes)     
Impossible directions
Our brain sees what it thinks is an everyday
object, but something is wrong!

Stare at this image for a minute
then look at a blank white surface.

As our eyes perceive the light in an image, chemicals in our eyes are used up momentarily.  This results in a negative after-image.