Optical illusions

Mar 28, 2014 at 4:00 a.m. ET

1 /9: Rotating rings

1/9 :Rotating rings

2 /9: Are the lines crooked

2/9 :Are the lines crooked

3 /9: Circles

3/9 :Circles

4 /9: What color are the dots

4/9 :What color are the dots

5 /9: Not-spirals circles

5/9 :Not-spirals circles

6 /9: An impossible triangle

6/9 :An impossible triangle

7 /9: Are therollers moving

7/9 :Are therollers moving

8 /9: Shivering purple circle

8/9 :Shivering purple circle

9 /9: Spinning discs

9/9 :Spinning discs