In May of 2013, for our last special issue on 3-D, I wrote a guest editorial with the title "Is 3-D Dead (Again)?" The 3-D in question was stereoscopic 3-D for consumers. In that editorial, I focused on a fundamental limitation of stereoscopic 3-D - the vergence-accommodation conflict. This conflict is caused by the fact that presentation of stereoscopic images on a single plane results in an unnatural decoupling of vergence (the point at which our two eyes converge) and accommodation (the point at which our two eyes focus), in contrast to real-world viewing where these two are always closely coupled.
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