afterimages

afterimages
n. visual image which remains after the actual stimulus has ceased

English contemporary dictionary. 2014.

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  • 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

  • Palinopsia — (Greek: palin for again and opsia for seeing ) is a visual disturbance that causes images to persist to some extent even after their corresponding stimulus has left. These images are known as afterimages and occur in persons with normal vision.… …   Wikipedia

  • Lilac chaser — is a visual illusion, also known as the Pac Man illusion. It consists of 12 lilac (or pink, rose or magenta), blurred disks arranged in a circle (like the numbers on a clock), around a small black, central cross on a grey background. One of the… …   Wikipedia

  • Monocular rivalry — Demonstration of monocular rivalry. Monocular rivalry is a phenomenon of human visual perception that occurs when two different images are optically superimposed. During prolonged viewing, one image becomes clearer than the other for a few… …   Wikipedia

  • Color — This article is about the perceptual property. For other uses, see Color (disambiguation). For usage of color on Wikipedia, see Wikipedia:Colors. Colored pencils Color or colour (see spelling differences) is the visual perceptual property… …   Wikipedia

  • Subitizing and counting — Subitizing, coined in 1949 by E.L. Kaufman et al.cite journal|author=Kaufman, E. L., Lord, M. W., Reese, T. W., Volkmann, J|year=1949|title=The discrimination of visual number|journal=American Journal of… …   Wikipedia

  • 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

  • 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

  • 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

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