Wednesday, April 13, 2011

Have a piece of string? Test your 3-D vision
[ Wed, 13 Apr 2011 12:04:20 GMT ]
When 3-D movies started hitting theaters, I was excited to take my kids to see them. But I didn't enjoy them myself — I just got headaches. An eye doctor showed me how to test my 3-D vision, with no more than a piece of string.

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