ILLUSION

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optical illusion

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ILLUSION

  1. 1. SINYAT PRESENTSOPTICAL ILLUSION
  2. 2. Sure, we have five main senses – sight, hearing, taste, touch and smell – but about75 per cent of the information humans receive about our environment comes fromour sight, making it the most ‘important’ of the five senses. The vision depends,obviously, on the EYES to see (with optic receptors called rods and cones) and onthe BRAIN to make sense of what we see. The optic nerve at the back of the eyeconnects to the central nervous system in the brain. The brain receives electricalimpulses (stimuli) from our eyes which are interpreted as SIGHT, but the brainadds two extra ingredients to the received image: memory and interpretation (inshort, perception). Sometimes the brain is deceived by information received fromthe eyes. Visual illusions are caused when differences occur between ourperceptions or expectations and the image seen by the eye. Actually, there areparticular illusions which deceive the human visual system into perceivingsomething that is not present, or incorrectly perceiving what is present.
  3. 3. Types Of Optical IllusionsThere are in all 3 types of optical illusions,namely:-1} Literal Illusion2} Physiological Illusion3} Cognitive Illusion
  4. 4. 1}Literal IllusionsLiteral optical illusions that create images that are different fromthe objects that make them.Like a rainbow or mirage
  5. 5. Physiological illusions, such as the afterimages following brightlights, or adapting stimuli of excessively longer alternatingpatterns are presumed to be the effects on the eyes or brain ofexcessive stimulation or interaction with contextual orcompeting stimuli of a specific type—brightness, colour,position, tile, size, movement, etc.
  6. 6. “cognitive illusions”The human eye has a blind spot where the optic disk islocated. We aren’t normally aware of this blind spot, butwith one eye closed, any object passing through thissmall area will disappear momentarily. Our visual fieldappears seamless because of an optical illusion: Ourmind conspires to fill in the blank area with the coloursof what surrounds it. We have other blind spotstoo“cognitive illusions” – that our minds and our culturework to obscure.
  7. 7. Photograph illusion
  8. 8. Photograph of eiffel tower or a ladies face
  9. 9.  Shadow illusions
  10. 10. 3D Street art a form of illusion
  11. 11. .Still image! Keeps rotating till you look atit directly.
  12. 12. Waving hearts
  13. 13. Rotating flowers
  14. 14. Waving coffee beans
  15. 15. Snake like image due to the colour combination
  16. 16. For any advertising campaign to stand out from thecrowd, a little bit of creativity is needed. Everycompany aims for an advert that will arose people’scuriosity, one that will get consumer to look at it asecond or even third time. There are many techniquesused and the most wondrous of them is the opticalillusion which, if done right, will stick long in thememories of consumers,
  17. 17. Let s have some fun and try a fewoptical illusion
  18. 18.  Rabbit or a duck ?
  19. 19. Very old and classical one. Those orange circles are the same size by the way.
  20. 20. Count the Black Dots
  21. 21. Stare at the black dot

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