From: Ignacio Fernández Galván (jellby_at_yahoo.com)
Date: Tue Nov 09 2010 - 03:05:03 CST

> Why not set stereo mode to cross eyes and visualize that way? Requires
>no
> additional hardware and is quite easy. I'm sure you can find a good
> tutorial for viewing that by googling cross eye 3d or somesuch. The main
> idea is to cross your eyes in front of the screen and superimpose the
>right
> eye's image of the left screen image with the left eye's image of the
>right
> eye's image (such that the path of the line of sight of the individual
>eyes
> crosses, hence the name). It takes a bit of trying, and some people find
> focusing on a finger held in the middle to help initially.

Aren't there glasses that help seeing this, something like a stereoscope? Just
four well-placed mirrors should be enough:
http://www.funsci.com/fun3_en/stscp/stscp.htm (this is for uncrossed eyes)