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Some more expensive viewing systems
utilize lens arrays to help guide the right and left images into the correct
eye of the viewer. These systems typically do not require the use of glasses
and are classified as autostereoscopic displays. Current autostereo displays
use a squished side-by-side format. The draw back to an autostereo display
is that your head must be in a specific location in order to view the image.
If your head is not in the correct location, a 3D image will not be seen.
An example squished side-by-side image is given below:
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