The effect of optical blur on visual-geometric illusions

Stanley Coren, Lawrence M. Ward, Clare Porac, Robert Fraser

Research output: Contribution to journalArticlepeer-review

69 Scopus citations


Blur, due to optical aberrations in the eye, has been implicated in visual illusions for converging line arrays. Using 26 illusion variants, 2.5 diopters of optical blur was optically induced, resulting in increased illusory effects for the Poggendorff and several Mueller-Lyer variants, but not for the other configurations. Some limitations on conditions drawn from induced blur are discussed.

Original languageEnglish (US)
Pages (from-to)390-392
Number of pages3
JournalBulletin of the Psychonomic Society
Issue number6
StatePublished - Jun 1978

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)


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