Above are two versions of the same illusion. What do you see when you look at the picture?
Do you see a young girl or an old hag? The young girl is looking away from you toward the back-left corner of your computer. The old hag is looking directly to the front-bottom-left of your computer. The necklace around the young girl's neck is the mouth of the old woman, the young girl's ear is the old woman's eye, and the young girl's chin is the old woman's nose.
THE NECKER CUBE - A classic illusion!
Do you see the blue panel as being on the back-left side of the cube or on the front-left side? Try blinking your eyes.
OLD MAN
Can you see the young couple kissing? The young boy's hair is the Old man's right eye (your left), and the young girl's hair is the old man's left eye (your right). Her skirt forms the beard on his chin, and the boy's arm forms the old man's mouth.