Human senses are tools to recognizing world surrounding. Those bring inputs the information that then will proceed in the brain. Eyes, one of the senses that we may feel have took more information from it rather than the other senses. However, eyes actually just a tools that our brain will by itself “decide” how the information will be perceived. Here, I will focus on how sensation and perception occur in relation to eye sense.
Firstly, I will explain about what is sensation and perception in simple words. Sensation is a neurological stimulation on the five senses that proceed on the nerve system. And perception is about how the brain perceive the information that receive from the five sense and may bring different output from the “truth” in to our mind.
We feel sensation when there is a stimulation received from the surrounding that then would be transferred into nervous system to be proceed on the brain, until then we can feel it. Then, when human brain received the inputs, it will process the information and somehow resulting a perception in human’s mind. The perception created is actually formed based on the human’s unconscious memory about the past experience.
Both sensation and perception are related to each other. We can see how it related to each other on the process that I have explained before. Every time our senses get a stimulation, it will transferred through the nervous system then we immediately feel the sensation, then from the sensation that we feel, our brain continue to perceive it in form of a “conclusion” about a thing, such as the color is lighter or darker, etc.
Here I put an example about sensation and perception. When we have two identical square paper with the exactly the same color, then we put one on larger paper with lighter color and the other one with darker color. Then, let see how the square paper will be seen, the square paper on the lighter paper will be “darker” while the other square on the darker large paper will be seemed “lighter”, although actually both squares are the same color, but when we put that on the different surrounding, it will seems different. That is all because the brain not “copy” the information exactly from the what the retina got from the surrounding. The brain will perceive the information base on the “unconscious” memory from the past and effect on what we “see”.
Those explanation above bring a new question about “Do we actually can believe on what we see?”. For me personally, I do a bit confuse to answer whether I believe it or not, but I accept what I’m seeing as how my brain bring the illusion in to my mind. In other words, it seems like I automatically choose to believe what I’m seeing, although I know that actually what I have seen is not really same as the truth on the real fact.
Koch, C. (2010, July 1). Looks Can Deceive: Why Perception and Reality Don’t Always Match Up. Retrieved February 04, 2016, from http://www.scientificamerican.com/article/looks-can-deceive/
The science of optical illusions. (2010, October 18). Retrieved February 04, 2016, from http://www.bbc.co.uk/news/magazine-11553099