afterimage — Also referred to as aftersensation, afterimagery, and post image. All three terms are used to denote a group of visual percepts that occur in response to a primary light stimulus to the eye, typically noticed after the stimulus has been… … Dictionary of Hallucinations
Afterimage — For other uses, see Afterimage (disambiguation). If the viewer stares at this image for 20 60 seconds and stares at a white object a negative afterimage will appear (in this case being cyan on magenta). This can also be achieved by the viewer… … Wikipedia
hering image — ˈhā]riŋ , ˈhe] noun Usage: usually capitalized H Etymology: after Ewald Hering died 1918 German physiologist and psychologist : a first positive afterimage in a succession of visual afterimages resulting from a brief light stimulus and appearing… … Useful english dictionary
positive afterimage — A term used to denote an afterimage that has the same relative brightness relations as the primary optical stimulus (for example, a dark blue afterimage of a dark blue pen). The term positive afterimage is used in opposition to the term *… … Dictionary of Hallucinations
Hess afterimage — The eponym Hess afterimage refers to the German ophthalmologist Carl von Hess (1863 1923). It is used to denote a positive afterimage that appears third in a temporal sequence of afterimages resulting from a brief light stimulus. Hess… … Dictionary of Hallucinations
Purkinje afterimage — Also referred to as Purkinje image and Bidwell s ghost. The eponym Purkinje afterimage refers to the Bohemian physiologist Johannes Evange lista Purkyne (1787 1869). It is used to denote a negative afterimage that appears secondly in a… … Dictionary of Hallucinations
postimagen de Hering — Eng. Hering s afterimage Primera postimagen positiva que sigue a una breve estimulación lumínica o cromática, del mismo tono y características que el estímulo original … Diccionario de oftalmología
Ewald Hering — Infobox Scientist name = Ewald Hering birth date = August 5, 1834 birth place = Alt Gersdorf, Saxony death date = January 26, 1918 death place = Leipzig, Saxony residence = citizenship = nationality = Germany ethnicity = field = physiology work… … Wikipedia
colour — /kul euhr/, n., adj. v.t., v.i. Chiefly Brit. color. Usage. See or1. * * * I Aspect of any object that may be described in terms of hue, brightness, and saturation. It is associated with the visible wavelengths of electromagnetic radiation, which … Universalium
Opponent process — For the universal psychological and neurological model, see opponent process theory. Opponent colors based on experiment. Deuteranopes see little difference between the two colors in the central column. The color opponent process is a color… … Wikipedia
