Optical illusions used in IQ tests: The normal brain will see different objects or images from different angles.
An optical illusion is a strange, attractive, negative image of an object, painting, or person that confuses the brain.
Blindness has many physical, physiological and cognitive aspects.
Psychoanalysis involves visual illusions because they tell you how to see things.
The picture of an umbrella without an owner is a good example of this.
The above brain puzzle asks you to find the Umbrella without an Owner.
As it rains in the city, people walk with umbrellas on the roadside.
The tall city skyscrapers are passed by autos crossing the roadway.