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3D in movies : How it works

Everything in the world that has eyes has at least two of them, so clearly nature thinks that stereo vision is worth the investment. You live in a 3D world – you see in stereo all the time: what makes it so amazing in the movie theatre is the novelty of seeing 3Ds where you are used to seeing 2.

There is no practical way of presenting stereo in a theatre without some kind of glasses because what you call ’3D’ or ‘stereo’ is really something that is happening inside your head.

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