People look at the world and see things differently. Their view of their objective environment is filtered by perception, which is the unique way in which each person sees, organizes and interprets things.
Perception is a process by which individuals organize and interpret their sensory impressions in order to give meaning to their environment.
DO NOT READ THE WORDS, SAY ALOUD THE COLOR OF EACH WORD. YELLOW BLUE ORANGE BLACK RED GREEN PURPLE YELLOW RED ORANGE GREEN BLACK BLUE RED PURPLE GREEN BLUE ORANGE
You can see a white vase as figure against a black background, or two black faces in profile on a white background
Can be seen in different ways to make different images.