1) Visual system
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https://www.crosswordclues.com/clue/phosphene
A phosphene is a phenomenon characterized by the experience of seeing light without light actually entering the eye. The word phosphene comes from the Greek words phos (light) and phainein (to show). Phosphenes that are induced by movement or sound are often associated with optic neuritis. Phosphenes can be directly induced by mechanical, electric...
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http://en.wikipedia.org/wiki/Phosphene
light seen when the eyeball is pressed
Found on
http://phrontistery.info/p.html
• (n.) 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. After-image.
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http://thinkexist.com/dictionary/meaning/phosphene/
(from the article `radiation`) Generally speaking, humans do not sense a moderate radiation field; however, small doses of radiation (less than 0.01 Gy) can produce phosphene, a ... ...can also activate the receptor if they are sufficiently intense. Thus, one may `see` pressure when, for example, the thumb is placed on a close...
Found on
http://www.britannica.com/eb/a-z/p/59
<ophthalmology, physiology> Visual sensations arising from mechanical stimulation by pressure upon the eyeball when the lids are closed. It can also be produced by electrical stimulation of the eyeball. ... It is a luminous impression produced through excitation of the retina by some cause other than the impingement upon it of rays of light.
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http://www.encyclo.co.uk/local/20973
(fos´fēn) an objective visual sensation that occurs with the eyes closed, and in the absence of retinal stimulation by visible light.
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http://www.encyclo.co.uk/local/21001
Phos'phene noun [ Greek ... 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. Confer
After-image .
Found on
http://www.encyclo.co.uk/webster/P/75
Type: Term Pronunciation: fos′fēn Definitions: 1. Sensation of light produced by mechanical or electrical stimulation of the peripheral or central optic pathway of the nervous system.
Found on
http://www.medilexicon.com/medicaldictionary.php?t=68438
phosphene A sensation of seeing light caused by pressure or electrical stimulation of the eye. A phosphene is an entoptic phenomenon (visual effect whose source is within the eye) characterized by the sensation of light from mechanical, electrical, or magnetic stimulation of the eye's retina, or from random firing of cells in the visual system, ra...
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http://www.wordinfo.info/words/index/info/view_unit/2616/
No exact match found.
