Check your vision
Some people cannot see any movement on optical illusions pictures. Scientists explain this phenomenon by different psychological states of observers.
Please look at this image
And respond, do you see movement?
According to statements of the psychologists more intense movement indicates your stress susceptibility.
If you do not notice any movement of colored strips, then you are resistant to stress.
By the way, in my collection of vector illustrations you will find other optical illusions.
Click on my profile.
Photo credits: Yurii Perepadia.