- 1. Was it a man face or a man playing flute?
This optical illusion is of ambiguous image, Ambiguous images exploit our middle vision, the step in the process of seeing an object where we are able to classify it as something particular. Since artist include different objects using the same elements we can swing back and forth in our middle vision all day long when viewing the painting.
- 2. Image is moving or still?
This static image appears to move as the result of illusory motion.
- Through the use of curvature, color and shape, images that are static give the appearance of motion, perhaps as the result of a cognitive interruption in the brain triggered by edges found between black and white (note the subtle use of black and white converging throughout this image) or perhaps the way our brains perceive the transition from light to dark as motion. Even more impressive, optical images like this one can move is different directions depending on the viewer at any given time.
- 3. What you see angry face on left and calm face on right? Move away from your screen and see again.
Both of the faces you see above are hybrids – each face is actually a combination of two faces. The left hand face shows an angry man in fine detail, but within the picture there is also coarse detail of the calm face. Move away, and you lose the fine (angry) detail, and just see the coarse (calm) detail.When we look at an object, we can normally see both fine detail and coarse detail. However when we are close, the fine detail will dominate, and when we are further away, we lose the fine detail, and see more of the coarse detail.
- 4. Does Lincoln’s face look normal when upside down?
Its quite normal when face is upside down but when you look at it upright the eyes look distorted.
It is because some neurons in the brain arespecialized in processing faces. Faces are usually seen upright. When presented upside down, the brain no longer recognizes a picture of a face as a face but rather as an object. Neurons processing objects are different from those processing faces and not as specialized. As a consequence these neurons do not respond to face distortions as well. This explains why we miss the weird eyes when the face is inverted.
- 5. Stare at the woman’s nose for about 10 seconds. Then look at a lighter surface, like a wall, and blink rapidly. Her face should now have color!
What you are experiencing is known as a negative afterimage. This happens when the photoreceptors, primarily the cone cells, in your eyes become overstimulated and fatigued causing them to lose sensitivity. In normal everyday life, you don’t notice this because tiny movements of your eyes keep the cone cells located at the back of your eyes from becoming overstimulated.
If, however, you look at a large image, the tiny movements in your eyes aren’t enough to reduce overstimulation. As a result, you experience what is known as a negative afterimage. As you shift your eyes to the white side of the image, the overstimulated cells continue to send out only a weak signal, so the affected colors remain muted. However, the surrounding photoreceptors are still fresh and so they send out strong signals that are the same as if we were looking at the opposite colors. The brain then interprets these signals as the opposite colors, essentially creating a full-color image from a negative photo.
By – Nursing Tutor – Mrs. Deepika
Department of Nursing
College Of Nursing UCBMSH
Uttaranchal (P.G.) College Of Bio-Medical Sciences & Hospital