An early antecedent to modern random dot stereograms - 'The Secret Stereoscopic Writing' of Ramon y Cajal

  • Bergua A
  • Skrandies W
  • 11


    Mendeley users who have this article in their library.
  • 18


    Citations of this article.


The use of computerized random dot stimuli in modern neuroscience was introduced by Julesz in the 1960s. This method made it possible to study exclusively cortical processing of binocular information by disparity-sensitive neurons, and it has attained widespread use among neuroscientists and psychologists. It is now largely forgotten that in the last century, the famous neuroanatomist Ramon y Cajal had worked on random dot stereograms as a means of encoding written information. A brief note was finally published in a Spanish journal on photography in 1901. We present a translation of this text and summarize the early ideas on random dot stereograms, and we also supply a brief historical account on stereoscopic perception. Copyright (C) 2000 Elsevier Science B.V.

Author-supplied keywords

  • History
  • Human vision
  • Ramon y Cajal
  • Random dot stereogram
  • Stereoscopic perception

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • Antonio Bergua

  • Wolfgang Skrandies

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free