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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.

[French phosphène : Greek phōs, light; see phos- + Greek phainein, to cause to appear, to show; see bhā- in Indo-European roots.]


(Physiology) the sensation of light caused by pressure on the eyelid of a closed eye or by other mechanical or electrical interference with the visual system
[C19: from Greek phōs light + phainein to show]


(ˈfɒs fin)

a luminous visual image produced by mechanical stimulation of the retina, as when pressing on closed eyelids.
[1870–75; < French phosphène, irreg. < Greek phôs light (contraction of pháos) + phaínein to show, shine]


[ˈfɒsfiːn] Nfosfeno m
References in periodicals archive ?
The idea is to produce phosphenes, the sensation of seeing light in the form of white patterns, without seeing light directly.
Give magnesium sulfate to mother if any of: Do not [] No * Systolic blood remove [] Yes, given pressure [greater than or equal to] 140 or diastolic blood pressure [greater than or equal to] 90, accompanied by any of the following: Severe headache, visual alterations such as visual disturbance or phosphenes, pain in right hypochondrium or epigastric pain, vomiting, hematuria, oliguria, thrombocytopenia or suspected Hellp syndrome.
This excites neurons to generate phosphenes. The generation of these phosphenes in the visual cortex can be used to restore vision and give the blind the ability to recognize objects.
[26] postulated that at least 625 pixels/ phosphenes are needed for resolving basic images or the gist thereof.
The ocular symptoms included amaurosis fugax (22 cases), photophobia (5 cases), visual loss (24 cases), floaters (20 cases), metamorphopsia (3 cases), phosphenes (5 cases), diplopia (2 cases), and ocular/periorbital pain (7 cases).
Phosphenes are light sensations occurring in the eyes that can be induced by external electrical stimuli [10].
In addition, blurred vision, a change in colour perception, central scotoma, headaches, retro-orbital pain precipitated by eye movements and flashes of light or black squares (phosphenes) are characterized by optic neuritis.
MUSIC Phosphenes Debut show from Phosphenes with support from Boris a Bono and Johana Hartwig.
In other words, there intuitively is an individuation of the phenomenal properties of our experiences, like the painfulness of our pains and the reddishness that our present perception of a red tomato shares with certain of our after-images and even with some of our phosphenes, as intrinsic, hence monadic aka non-relational, properties of our experiences, for no worldly properties in the last two cases contribute to the constitution of such phenomenal properties.
Peut-etre ne faut-il retenir que les traces laissees a meme le reseau, comme si nous cherchions a prolonger la persistance d'une image sur la retine, pour en capturer a notre tour quelques phosphenes, pour en reagencer les pixels a notre guise, comme ce temoignage de l'auteur lui-meme qui se declarait en partie anonyme ?
The first person to receive the neural implant from developer Second Sight, the 30-year-old is able to 'see' individual phosphenes or spots of light when his visual cortex is stimulated by the device.
Incidence of adverse events such as symptomatic bradycardia, asymptomatic bradycardia, and phosphenes similarly occurred in any of the age groups [32, 33].