A case related to illusions
Everyday, we hear, we sense, we see a lot of information. When our brain, our perceptual system, misinterprets the information, the perceptual illusions occur. It is a cognitive perception, because you transmit information to the brain and our brain starts to process.
I came up with four examples that are either from my own experiences or from my visual observation. And I think they can be used to illustrate perceptual illusions. But I’m not sure whether two of those examples are perceptual illusions. I think they are more similar to optical illusions.
 Beauty & Health Care Stores
As a girl, I often go to some beauty stores to purchase some cosmetics. Sometimes when I step into a beauty & health care store, I have a feeling that the store is very big and bright. But actually it’s not the case. The owner of the store usually decorate the store with full of mirrors, the mirrors may give the consumers the feelings that this store is really big. It’s often the promotion strategy that the stores used. In this case, the actual and perceived size of the store has a discrepancy. My brain misinterprets the size of the store, and then it’s perceptual illusion.
 The railways
When I was very young, my parents were too busy to take care of me. So I spent a lot of vacations in my grandparents’ home, and I took the train to their home. Each time when I was on the train and the train was in the platform waiting to leave, I felt that our train was moving when the other train passed by. I perceived the train was moving, but actually it did not move.
Moreover, when I get off the train, I like to play in the platform and hear the sound of the train went by. I found that the parallel tracks seemed to intersect with each other when it went further. The perceived and actual impression of the tracks is not the same. The tracks did not intersect and stayed parallel. It’s the perceptual illusion.
 Beautiful girl & Old woman
This case was from my observation when I went out with my friend. We are under a period of adolescence, so each time I go out with my friends, some of my friend my judge the pedestrians just in front of us. One time we were on the street, we saw a girl in front of us had a long black hair; she worn short pants and her legs were long and skinny. But when she looked back, we found that actually she was quite old. The figure of her back gave us a wrong perception that she was young and pretty. This can be described as perceptual illusion.