Illusion

Warning: This page contains some works of "anomalous motion illusion", which might make sensitive observers dizzy or sick.

Should you feel dizzy, you had better leave this page immediately.

"My Wife and My Mother-In-Law"
Visiting card, germany, 1888
Can you see a Young woman & an Old Lady

Which way is the wheel turning!?
Focus on the red dots and follow them round... it appears to be rotating anti-clockwise. However, if you follow the yellow dots round instead, the whole wheel will be turning the other way! - clockwise!

In this optical illusion, if you follow the movement of the rotating pink dot with your eyes, the dots will remain only one color, pink.
However, if you stare at the black + in the center, the moving dot will turn green.

Keep concentrating on the black + in the center of the picture.
After a short period, all the pink dots will slowly disappear and you will only see a single green dot moving in a circle.