Optical phenomena Create Talk0 Category page This page needs content. You can help by adding a sentence or a photo! Add to this page! Optical illusions “Assessment | Biopsychology | Comparative | Cognitive | Developmental | Language | Individual... Emmert's law Optical phenomenon Pages in category "Optical phenomena" The following 3 pages are in this category, out of 3 total. Optical phenomenonE Emmert's lawO Optical illusions Retrieved from "http://psychology.wikia.com/wiki/Category:Optical_phenomena"