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If seeing both light and image outlines depends on the refraction of light as well as a physical picture implanted on the back of our eyes on the retina, then how would an invisible person see? This consideration will seriously impede my enjoyment of stories involving invisible people since they wouldn’t be able to see. Perhaps that is why they have cartoons with eyeballs floating around. What we learned in class also really helps me to see how our processing of any input is really dependent on the physical realities of our bodies and nervous systems.