Our contemporary world is full of enigmatic things. A number of them cannot be explained even by scientific specialists. Others constitute a group of illusions. Illusion world is wide, not many people possess good knowledge about it. Everybody knows that when a spoon is dropped into a glass of water it seems to be broken, although in objective reality it's not. There is a great range of other similar optical illusions. Watching different kinds of optical illusions is a good pastime for people with broad mind. Optical illusions are characterized by visually perceived images that are different from object reality.
Our eyes gather info that is processed by brain. In result we obtain a percept that does not match to what's really displayed. The kinds of the optical illusions are different according to the object that forms this optical illusion. For instance, literal optical illusions form images that are different from the objects that make them. You have probably observed such pictures where at first you notice a certain object, but when you look more attentively you realize that this image is formed using other objects. An example of this literal optical illusion is a vase formed by two faces. These images are usually called ambiguous images. It is from time to time really difficult to see another picture on the same picture. Physiological optical illusions have certain effect on our eyes and brain and as a result we get an illusion of different parameters – color, brightness, movement, size. For instance, there are images where some objects seem to be of different color or size, when in objective reality they are absolutely the same.
Optical illusion of Muller-Lyer with arrows is a great example of this kind of visual illusions. Cognitive illusions make the brain made not correct conclusions from what our eyes observe. These illusions include paradoxical and impossible objects such as Penrose triangle and impossible staircase, and hallucinations as well. Optical illusions represent an excellent amusement for people. What is more, they help to look at our world from the other side. In result your brain will get flexible that will definitely assist you in future life.
