For your viewing

Here are some visual illusions. I included some favorites from old posts. You will probably have to click on many of these pictures to get an enlarged view to see the illusion. I set it so the pictures will pop up in a new tab or window (depending on your browser.)


These two tables ave the same dimensions:
In the image on the left, squares A and B are the same shade of gray. The image on the right proves it.
These lines are all horizontal.

This triangle is impossible.Try to follow the stairs up.
Move your head from side to side, and the inside of the circle seems to move.
Move your eyes around.
Can you spot the word in the face?
Think about it.
You have to click on this picture to enlarge it. This is a static picture, but as you can see it seems to move. If you really want to give yourself a headache, set it as your computer background like I did.
All these lines are vertical and horizontal:
You will recognize these two from a recent post.


Read the directions:
Count the legs:

For an older post of some cool sites to explore with spirals and moving optical illusions, go here.
Here is a spiral you can stare at. The next thing you look at will appear to be swirling.
Source.