How to View

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A Pokescope is ideal for large left/right pairs on computer screens.
Printed pairs can be enjoyed with a Lorgnette stereo viewer or an old-timey Holmes stereoscope.
Red/blue glasses are common. You may have a cardboard pair in an old comic book.
Drop by a meeting of your local stero photography club for breathtaking larger-than-life projection shows viewed with movie-style polarized glasses (I'm a member of the Oakland Camera Club).
You can also achieve the stereo effect by staring at the stereo pair with crossed eyes. It takes some practice.