Optical Illusions

Test your perception on these

1. Move your scroll bar up and down.

2. How many black dots?

3 . Stare at the image below for 10 seconds,
then look at the white rectangle below it.

4 . Are the horizontal lines parralel?

5. Are the two oranges the exactly the same?

6. Are the cogs slowly rotating?

7. How many legs?

8. Spinners

9. Cylinders

10. Waves

11. Concentrate on the cross in the centre. After a while the purple dots seem to disappear...