Here comes my puzzle, which haunting me for a long time: Why so many people focus on Vision study? Vision is just a part of our sensation system and there are other crucial senses, such as odor system, people pay much more less attention on them. Why vision?
Christof Koch explained why he focuses on Vision in his famous book THE QUEST OF CONSCIOUSNESS as follows:
First, humans are visual creatures. This is reflected in the large amount of brain tissue dedicated to the analysis of images, and in the importance of seeing in daily life. If you have a cold, for instance, your nose becomes stuffy and you may lose your sense of smell, but this impairs you only mildly. A transient loss of vision, as occurs during snow blindness on the other hand, devastates you.
Second, visual percepts are vivid and rich in information. Pictures and movies are highly structured, yet easy to manipulate using computer-generated graphics.
Third, as noted already by the young philosopher Arthur Schopenhauer in 1813, vision is more easily deceived than any of the other senses. Blablabla...
Last and most important, the neuronal basis of many visual phenomena and illusions has been investigated throughout the animal kingdom. Perceptual neuroscience has advanced to such a point that reasonably sophisticated computational models have been constructed and have proven their worth in guiding experimental agendas and summarizing the data.