The viewers are supported by two metal legs which are unfolded into a
standing position. The viewer is then placed over the micrographs, which
are spread out on a flat surface, and the two fields, taken at two different
angles (to give parallax), are viewed simultaneously through the two lenses,
with both eyes. The coated lenses are 32 mm diameter and are adjustable for
different interpupillary distances.
Some experimentation is always needed in order to determine whether, for a
particular stereo pair, which field should be viewed to the left and
which to the right. Other wise, what would appear to be an elevation will end up
appearing as a depression.
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