1) This document contains several optical illusions and visual perception tests including images that play tricks on the eye through uses of color, shading, motion, and spatial relationships. 2) Many of the images are designed to create ambiguous, impossible, or hidden images through optical effects that can be seen differently depending on how the viewer focuses or positions their eyes and head. 3) The document aims to demonstrate how visual perception can be manipulated in many interesting ways and includes tests for things like color blindness.

1. OPTICAL
ILLUSIONS

2. Which square is darker, A or B?

4. The ‘brown’ square in the centre top, and the ‘orange’ square
in the centre front are exactly the same shade of brown.
Don't believe it?

5. Are the two circles the same colour?

6. Which part of the picture is darker – left or right side?

8. What do you see?

9. Do you see
a ‘floating triangle’?

10. Are the lines
parallel?

11. Totally straight lines?

13. Which is larger – the left or right hand card?

14. The SCINTILLATING GRID – black dots appear at random intersections
Focus on a single intersection, the dot does not appear.
The dots disappear if you are too close or too far from the image.

15. Move your head
back and
forward.
What happens
to the
circles?

16. Focus on just
the centre circle
while moving
your head

17. How many
circles
can you see?
Did you see the
16 circles?

19. If your eyes follow the
movement of the
rotating pink dot,
the dots will remain
only one color, pink.
However if you stare
at the black " +" in the
center, the moving
dots turns to green.
Now, concentrate on
the black " + " in the
center of the picture.
After a short period,
all the pink dots will
slowly disappear, and
you will only see only
a single green dot
rotating.

20. What do you see?
Duck or rabbit – or both?

21. How many legs does the elephant have?

22. One face?
Or two profiles facing each other?

24. Look at the wildlife painting of a Bengal tiger.
Can you find the hidden tiger in the picture?

25. “the hidden tiger” is written in the tiger

26. Whose face do you see?
At normal screen viewing
distance you should see
the face of the scientist
Albert Einstein.
Take a few steps back
from the image and
Marylin Monroe
appears

27. Dr Angry and Mr Calm!!

28. The "illusion" is that this is just a picture of coffee beans; but it is not.
Can you find a man's face among the beans?
If you find the face in 3 seconds or less, the right half of your brain may be
more well developed than most.

29. What do you see?
In black you can read the word GOOD;
but the word EVIL also appears in white letters inside each black
letter.

30. What word can you see?

31. What do you see?
You may not see it at first, but the white spaces create the word
OPTICAL,
while the blue landscape spells out ILLUSION

32. What do you see?
You probably read the word ME in brown,
but.......
when you look through ME
you will see YOU!

33. What do you see?
You should see a face ….
but also a word.
Tilt your head to the right –
the word begins with L.

34. Read what the sign says

35. Read what the sign says

37. Look at the chart and say the colour
black – blue – green – orange – purple – yellow

38. Look at the chart and say the colour and NOT the word!
black – blue – green – orange – purple – yellow

39. Count the people in the picture below.
After they shift, count them again!

41. The sections of
the triangle have
been moved
around
– but where does
the empty box
come from?

42. How many deer can you see in the picture?
Just the one?

43. How many horses can you
see in the picture?
Some people see 5, some
6 and some even see 7!

44. What do you see in this picture?
Can you see the baby?

45. What do you see?
Try blinking quickly!

46. This is called an "impossible object," which means that
it's impossible to build.
But drawing it is not impossible, as you see in the image.

47. Perpetually ascending staircase...
how can the man go up all the time
and come back to the same place over and over?

48. IMPOSSIBLE STAIRS

60. DIGITAL
BUMPS

61. MOVING HEART

62. 1 length of rope
…..or 2?

63. Look at the next slide.
Focus on the 4 small dots in the centre of the picture and look
at the picture for 30-40 seconds.
Now turn to following slide which is completely blank.
Blink a couple of times.
Concentrate for 20 seconds.
What do you see?

66. Use the next two slides.
Slide 1
Stare at the black spot in the centre of the four coloured
squares for about 30 seconds.
Slide 2
Look at the next slide and stare at the black spot in the
uniform white area.
Note the colors of the afterimages relative to the colors of
the original stimuli.
Did they appear different?

72. Two elderly faces, or a larger scene?

74. Julian Beever creates pavement art.
Many of his creations are optical
illusions, such as this one, where he
appears to be perched on a ledge,
waiting for Batman and Robin to
climb the building and rescue him.
In reality, there is just pavement in
front of him – the rest is a 'trick the
eye'.

75. Can you see the Shark in the picture above.
The trick is not to focus directly on the image but
try to focus on a point through the image.
With a bit of patience and relaxation you CAN do it.

76. What can you see in the picture above?
Remember the trick is not to focus directly on the image but
try to focus on a point through the image.
With a bit of patience and relaxation you CAN do it.

77. What can you see in the picture above?
And one final MAGIC EYE STEREOGRAM

78. TEST FOR COLOUR
BLINDNESS
You should be able to see the
number 10 in the image above.
What number do you see in the
image to the left.

79. TEST FOR COLOUR
BLINDNESS
If you did not see the number
you have some degree of
colour blindness!
1 in 10 boys probably won’t be able to see the number.

80. TEST FOR COLOUR
BLINDNESS
Did you see the number 26?
Just the number 2?
Just the number 6?
No number at all?