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 I found it more than a little bit disconcerting that sight is not fact, but rather our mind's interpretation of the world, especially since sight is generally perceived to be absolute fact (except for during hallucinations or mental illness, like the case of John Nash) . It seems sort of contradictory to everything that we learn about visual images as children. However, after thinking about it, sight as the brain's interpretation of our surroundings actually makes perfect sense. 
People have different tastes in what they find aesthetically pleasing, even though the actual objects (or people) that we are viewing are the same. It seems that while we often think of sight as something that cannot be manipulated by our minds, however the vast differences in taste suggest that sight is in fact, subject to interpretation by the brain.