This document discusses visual perception and optical illusions. It explains how light enters the eye and is processed by the retina, optic nerve and brain to form images. However, the brain can incorrectly or falsely interpret visual information, leading to optical illusions. Several types of illusions are presented, including ambiguous figures that can be interpreted in multiple ways, anamorphic figures that appear distorted but reveal hidden images, and impossible images that defy logic. The document aims to demonstrate how visual perception can be tricked in interesting ways.

1. VISUAL PERCEPTION
It is the way our brain organizes what we see

2. HOW WE SEE?
PUPIL
OPTIC
NERVE
LENS
RETINA
CORNEA
 The light goes to the object and it is reflected to
the eye.
 The light reflected passes through the pupil and
goes to our retina forming an inverted image.

3.  The optic nerve transports the nervous impulses
generated in the retina to the brain.
 The brain interprets the impulses received and
form an image which is what we perceive
HOW WE SEE?

4. But this process can be interfered by a serie of factors
that can make our brain form a wrong or false
interpretation.
-Wrong: Our brain interprets wrongly the visual
information.
-False: Our brain forms an image that it doesn´t exist.
These phenomena are called optical illusions.

5. AMBIVALENT
FIGURES

7. This woman is young or
older?

9. Discover the
different faces.

16. What do you see? A sax player or a
human face?

17. ANAMORPHIC
FIGURES

18. ANAMORPHIC FIGURES

19. ANAMORPHIC FIGURES

20. VISUAL TRICKERY

21. Are the squares above marked A & B
the same color or different?

22. Proof: They are the same. The
shadow causes an illusion of white.

23. Stare at the blue circles and move
your head back and forth from the
screen. Do the outer circles move?

24. Can you believe that this is a picture
and not an animation? To check, just
focus on one leaf for 5 seconds.

25. Nothing is Moving in this Image

29. IMPOSSIBLE IMAGES
OR OBJECTS

30. How many columns does this
monument have, 2 or 3?

32. How many legs does the elephant
have above?

34. Ikeuchi Hitochi.

35. Kokichi Sugihara.

36. Diego Uribe.

37. Paradox 4. Tamas Farkas