An optical illusion is something that you see that is deceptive or misleading.
The three optical illusions shown here are examples
of perception illusions. These illusions show ambiguous figures
in which the brain's perception may change very rapidly without any
change in what is seen by your eye.
The first illusion we will look at shows a reversible goblet. This illusion was
introduced by Edgar Rubin in 1915. Can you see the goblet? Can you see
the faces?
The next illusion is an example of a rival-schemata ambiguity. This illusion was first introduced in 1900 by a psychologist named Joseph Jastrow. Can you see the rabbit? Can you see the duck?
Hint: When the face looks to the right it is a rabbit, when the face looks to the left it is a duck.
The next illusion is a similar type of illusion where we can see a young girl or an old lady. This illusion was created by a cartoonist named W.E. Hill in 1915.
Hint: The young girl's chin is the old woman's nose.