phosphene

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phosphene

 [fos´fēn]
an objective visual sensation that occurs with the eyes closed, and in the absence of retinal stimulation by visible light.

phos·phene

(fos'fēn),
Sensation of light produced by mechanical or electrical stimulation of the peripheral or central optic pathway of the nervous system.
[G. phōs, light, + phainō, to show]

phosphene

/phos·phene/ (fos´fēn) a sensation of light due to a stimulus other than light rays, e.g., a mechanical stimulus.

phosphene

(fŏs′fēn′)
n.
A sensation of light caused by excitation of the retina by mechanical or electrical means rather than by light, as when the eyeballs are pressed through closed lids.

phos·phene

(fos'fēn)
Sensation of light produced by mechanical or electrical stimulation of the peripheral or central optic pathway of the nervous system.
[G. phōs, light, + phainō, to show]

phosphene 

A visual sensation arising from stimulation of the retina by something other than light. The stimulation can be either electrical, mechanical (e.g. a blow to the head or pressure on the eyeball), or some electromagnetic waves such as X-rays. See entoptic image; photopsia; adequate stimulus.
References in periodicals archive ?
In case of two reports, it was not clear whether the images were seen with open or closed eyes (aurora-like phosphenes, geometric shapes, fractals).
Working with graduate student Josef Peer, Kendl calculated that repetitive lightning strokes would trigger phosphenes "astonishingly well.
These patients may also experience reduced contrast sensitivity and disturbed colour vision or have dullness of vision, and in rare cases they might perceive phosphenes.
These phosphenes do not convey real-form vision, yet they do allow the wearer crude localization of outlines in the scene.
In this strongly determining context, contemporary works like Olafur Eliasson's Room for one colour (Library), 1997/2002--an installation of sodium-yellow lights that rendered a section of the institute's library nearly monochrome, or Ann Veronica Janssen's Phosphenes, 1997, a work inviting viewers to torment their eyeballs and generate phantom objects in the space between eyelid and retina, functioned as rapidly absorbable, cleverly minimal gestures rather than phenomenological investigations requiring visitors' time.
When stimulated, each electrode produces up to four closely spaced phosphenes, which have been described as resembling "stars in the sky.
When stimulated, each electrode produces one to four closely spaced phosphenes, which have been described as resembling "stars in the sky.
There was a biography of Baudelaire on my bedside table one time, and it sent me into a zone of opiated phosphenes.
By recognizing the phosphenes as patterns, Jerry has a sort of tunnel vision that enables him to distinguish the outline of a person or count fingers at arm's length.
4] The subjects of Dobelle's experiments reported seeing phosphenes, or points of light, akin to the signals received by a functioning visual system.
2 the forms of pulsating, iridescent geometric imagery (known as phosphenes, form constants or entoptic phenomena) experienced principally in the first stage of altered consciousness and that persist into subsequent stages;