phosphene

phosphene
Sensation of light produced by mechanical or electrical stimulation of the peripheral or central optic pathway of the nervous system. [G. phos, light, + phaino, to show]
- accommodation p. a p. occurring during accommodation, caused by sudden relaxation of the ciliary muscle.

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phos·phene 'fäs-.fēn n a luminous impression that occurs when the retina undergoes nonluminous stimulation (as by pressure on the eyeball when the lid is closed)

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phos·phene (fosґfēn) [Gr. phōs light + phainein to show] an objective visual sensation that appears with the eyes closed and in the absence of visual light.

Medical dictionary. 2011.

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  • Phosphene — is also a common alternative spelling of Phosphine, PH3, a toxic and explosive gas. rightA phosphene is an entoptic phenomenon characterized by the experience of seeing light without light actually entering the eye. The word phosphene comes from… …   Wikipedia

  • phosphène — [ fɔsfɛn ] n. m. • 1838; du gr. phôs « lumière » et phainein « briller » ♦ Méd. Sensation lumineuse qui résulte de l excitation des récepteurs rétiniens par un agent autre que la lumière (choc, compression externe ou interne du globe oculaire,… …   Encyclopédie Universelle

  • Phosphene — Phosphène Un phosphène est un phénomène interne à l œil qui se traduit par la sensation de voir une lumière ou par l apparition de taches dans le champ visuel. Les phosphènes peuvent être causés par une stimulation mécanique, électrique, ou… …   Wikipédia en Français

  • Phosphene — Phos phene, n. [Gr. ? light + ? to show.] (Physiol.) A luminous impression produced through excitation of the retina by some cause other than the impingement upon it of rays of light, as by pressure upon the eyeball when the lids are closed. Cf.… …   The Collaborative International Dictionary of English

  • phosphene — [fäs′fēn΄] n. [< Gr phōs, light (see PHOSPHORUS) + phainein, to show (see FANTASY)] a sensation of light produced by mechanical or electrical stimulation of the retina, as by pressure on the eyeball through the closed eyelid …   English World dictionary

  • phosphene —    Also known as unstructured photopsia. The term phosphene comes from the Greek words phos (light) and phainein (to shine). It is used to denote a transient flash or spark of light, commonly referred to as seeing stars . Phosphenes are * visual… …   Dictionary of Hallucinations

  • Phosphène — Un phosphène est un phénomène qui se traduit par la sensation de voir une lumière ou par l apparition de taches dans le champ visuel. Les phosphènes peuvent être causés par une stimulation mécanique, électrique, ou magnétique de la rétine ou du… …   Wikipédia en Français

  • phosphene — /fos feen/, n. Physiol. a luminous image produced by mechanical stimulation of the retina, as by pressure applied to the eyeball by the finger when the lid is closed. [1870 75; < F phosphène, irreg. < Gk phôs light (contr. of pháos) + phaínein to …   Universalium

  • phosphene — phos•phene [[t]ˈfɒs fin[/t]] n. oph a luminous visual image produced by mechanical stimulation of the retina, as when pressing on closed eyelids • Etymology: 1870–75; < F phosphène, irreg. < Gk phôs light (contr. of pháos) +phaínein to show …   From formal English to slang

  • phosphene — noun Etymology: International Scientific Vocabulary phos + Greek phainein to show more at fancy Date: circa 1860 a luminous impression due to excitation of the retina …   New Collegiate Dictionary

  • Phosphene — Phosphäne (v. griech. φῶς „Licht“ und φαίνειν „erscheinen“) sind Lichtwahrnehmungen, die nicht durch Licht, sondern durch andere Stimuli erzeugt werden. Dies können Wahrnehmungen durch Halluzinationen, physikalischen Druck auf die Netzhaut,… …   Deutsch Wikipedia

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