Optical Illusions

What is an optical Illusion?
It is an optical phenomenon resulting in false visual impressions.
Observe the following figures and enjoy the illusions.....
1)Is it a face or the word Liar?



2)Faces or Vases?



3)Which line segment is bigger?



4) Duck or a rabbit?



5) Find the lowest step.




6) Are the two horizontal lines parallel or non-parallel?






7) Count the number of legs.



8) Lines are straight or bending?


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Bye.