The document discusses several optical illusions involving shapes, lines, colors, and motion. It directs the reader to focus on different elements of various images to see how their perceptions change, such as circles appearing to turn or colors seeming to disappear. The illusions demonstrate that human vision can be tricked and that things are not always as they appear on the surface.

1. Optical Illusions

2. Covering the corners of the squares appear to be circles but there aren't any! Left click to move on

3. Count how many black points and white points are in the image 

4. Concentrate on the centre point then move towards and away from the image

5. The two lines are parallel but they don't appear so in this image

6. Are the lines parallel?

7. Are the red lines parallel ?

8. Is there a white triangle in the middle?

9. Up or down?

11. Is the centre circle on the left bigger than the centre circle on the right ? No, they are the same !

12. Are the circles turning? 

13. A paradox...

14. Is the circle round? .....

15. Look at the image from 5-6 metres away. Can you see a face?

16. Look at the red point on the left for 1 minute, then look at the image on the right

17. We see the red lines and behind them black lines, which in fact don't exist!

18. Look for one minute at the cross on the right, then look at the baby

19. Does it move?

20. Look carefully at the point in the middle. Do the colours disappear?

21. It appears to be growing..

22. Look at the red dots and the image appears to be turning anti-clockwise. Now look at the yellow dots and the image appears to be turning clockwise

23. That's All. Hope you enjoyed it. www.go-education.com