pressure phosphene

pressure phosphene

Dictionary of Hallucinations. . 2010.

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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

  • 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

  • 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 — /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 — 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 …   Medical dictionary

  • phosphene — [ fɒsfi:n] noun a sensation of a ring or spot of light produced by pressure on the eyeball or direct stimulation of the visual system other than by light. Origin C19: formed irregularly from Gk phōs light + phainein to show …   English new terms dictionary

  • phosphene — n. the sensation of rings of light produced by pressure on the eyeball due to irritation of the retina. Etymology: irreg. f. Gk phos light + phaino show …   Useful english dictionary

  • deformation phosphene —    Also known as pressure phosphene. The two terms are used interchangeably to denote a type of phosphene (i.e. seeing stars ) that can be provoked under physiological conditions by the exertion of gentle pressure on the eyeball. Deformation… …   Dictionary of Hallucinations

  • sensory reception, human — Introduction  means by which humans react to changes in external and internal environments.   Ancient philosophers called the human senses “the windows of the soul,” and Aristotle described at least five senses sight, hearing, smell, taste, and… …   Universalium

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