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It was interesting talking about our senses that we don’t recognize in daily life.  Just like a submerged part of an iceberg, subconsciousness plays a large role in sensing and determining the human behavior. In my daily experience, I found it interesting that when I don’t wear glasses or contact lenses, I am so easygoing and when my vision is clear, I tend to get nervous more.  So, depending on the vision, my behavior changes.  I guess my clear vision suppresses my subconscious activity of the brain and raising the level of consciousenss and reason. I want to know if there is scientific evidence or observation about the relationship between human eye’s vision, brain, and behavior.

Reading previous posts above, I liked the discussion in which our brain uses selective attention to focus on certain stimuli. I wonder what leads our subconsciousness to pick certain stimuli.  Is it previous experience or genetics or random?  What would be the mechanism of picking out some of the many stimuli?

My second question is why would the brain constantly process input?  Why would the human brain want to satiate itself with stimuli?  Is it about maintaining certain chemical homeostasis—a scientific phenomenon of human’s instict of knowledge generation?