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Message: <blockquote data-quote="Channel Hopper" data-source="post: 718781" data-attributes="member: 175144">_http://english.cri.cn/7146/2010/02/03/2361s547661.htm"The fact that the eyes are separated by 15 degrees or so, that is what gives rise to the three dimensional vision because each eye is seeing an object from a slightly different position. Sometimes children are born with either an inability to use the eyes together, or for some reason cannot and therefore one eye will point forwards and the other will point inwards, and if that happens, in order to stop seeing double vision, the brain will switch one eye off."Not really too different to those with hearing impairments and getting the best out of an expensive audio system. If you've never heard quality sound though, you cannot really miss it.</blockquote>