1. Insights into the brain and how it works
Visual illusions
Insights into the brain and how it works

2. Parallel lines? This illusion was first noticed on a tiled wall of a café in Bristol, England

3. Apparent movement: The snake illusion

4. Which central dot is bigger?

5. Is the black shape a perfect square or not?

6. A perfect circle?

7. Colour Perception

14. Square A and B are the same shade of grey!

15. Perfect squares?

16. How many shades of red and green do you see?

17. Which line is longest?

18. What animal can you see?

19. Now what do you see?

20. Stare at the central 4 dots for 1 minute now close your eyes and look towards a light!

21. Stare at the picture (on the left) for about 45 seconds
Stare at the picture (on the left) for about 45 seconds. Then, stare at the white section of this image (the right section). You should see the Queen again. Keep your concentration, and for those 45 seconds, don't take your eyes off the picture.

22. Movement?

23. Movement?

24. Moving?

25. Disappearing dots

26. Square?

27. Pink or green?

31. In this illustration, the stairs should turn upside down during a steady gaze. The wall with the floating glass sphere will shift from the foreground to the background (or vice-versa)

32. Do you think that these lines are parallel. They are
Do you think that these lines are parallel? They are! But it doesn't look like it does it? We suppose that's what makes it an illusion!!!

33. Ghostly black patches appear at the white intersections
Ghostly black patches appear at the white intersections. The illusion was noted by Hermann (1870) while reading a book on sound by Tyndall (1869).