phosphene

(redirected from Phosphenes)
Also found in: Dictionary, Encyclopedia.

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 ?
Working with graduate student Josef Peer, Kendl calculated that repetitive lightning strokes would trigger phosphenes "astonishingly well.
In the early 1990s, intraoperative stimulation in patients with late-stage retinitis pigmentosa (RP) showed that phosphenes could be elicited from blind retinal areas long after photoreceptor degeneration [3].
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.
For instance, visual experiences of "seeing" phosphenes, seeing an object with blurred vision, seeing "double," having afterimages, and the like.
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.
The rising and falling of heightened events and their disappearance into phosphenes and particles of dark.
Initially the perception of these phosphenes will be quite confused, but, through rehabilitation, patients should be able to learn how to interpret these phosphenes as meaningful images.
Phosphenes can occur spontaneously as a result of visual deprivation, and can be provoked in a number of ways.