-- Two ways they can be viewed, cross-eyed and wall-eyed
-- 1838, British, Charles Wheatstone (stereogram)
-- 1850, Scottish, David Brewster (changed the mirrors to lenses)
-- 1959, Bela Julesz, McArthur Fellow (found autostereograms)
-- 1979, Chirstopher Tyler, (created the first autostereograms)
-- 141 years to actually create one
-- 12 % of people have problems with binocular vision
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