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WHY DOES OUR MIND
SEE ILLUSIONS?
JAYSON JAMES M. MAYOR
BBTE IT 3-4D
POLYTECHNIC UNIVERSITY OF THE PHILIPPINES
OBJECTIVES
At the end of this presentation, you will be able to:
1. Understand how illusion happen.
2. Appreciate the importance of optical illusion.
INTRODUCTION
• An illusion is a distortion of the senses, revealing how the brain normally organizes and interprets sensory stimulation.
IMPORTANCE
• One simple way of proving the importance of two eyes in creating the 3D sensation is to close one eye and to try to slowly approach your two index fingers trying to touch them. Your fingers will probably be slightly misaligned because the brain isn't entirely successful in figuring out the position of your hands (and fingers) in the 3D space. Thus, the differences between the two retinal images are indeed useful.
• The Human brain put images together because it has learned to expect things; sometimes the data might get a little confused.
• We may see an illusion because we know what we are expected to see, even though part of a picture or design may not be completely there. The basis of this is in how we perceive things.
Example
• One example of optical illusion is the television. The television just shows us a continuous flow of still pictures, one right after the other. Your eyes, along with your brain, fill in all of the empty spots.
• Our brain has learned to expect movement. As a result, our brain can fill in all of the missing pieces and the pictures on the television appear to be moving, even though they really aren’t!
• A computer monitor is also one big optical illusion. Sometime, when you have a chance, look at a computer screen very closely for a minute or two. You will notice that your computer screen is made up of tiny red, green, and blue dots.
• The illusion here is that you see more than just red, green, and blue dots; you see thousands of different colors. Our brains put the red, green, and blue dots together to make the colors!
Example
DID YOU KNOW
• Some studies have shown that we're doing it much more often than we think. But in such cases it seems much more difficult to identify the underlining assumptions. Why do we create these illusions? While perceptual illusions (illusions regarding objects) happen as side effects of our otherwise very clever brain, psychologists usually argue that the illusions regarding other people serve certain purposes (such as protecting our self-image)
If you take a look at the following picture , let me tell you
... it is not animated. Your eyes are making it move. To
test this, stare at one spot for a couple seconds and
everything will stop moving. Or look at the black center of
each circle and it will stop moving. But move your eyes to
the next black center and the previous will move after you
take your eyes away from it.... Weird
Are the purple lines straight or bent?
Which circle in the middle is bigger?
Do you see gray areas in between
the squares?
Now where did they come from?
Do you see an old man's face or two lovers kissing?
Do you see a musician or a girl's face?
Do you see the face? Or an Eskimo?
I HOPE YOU ENJOYED
OUR GAME.
IF YOU WANT MORE ANOTHER OPTICAL ILLUSIONS DON’T BOTHER TO ASK ME ON
MY E-MAIL
