During recovery patients may experience phosphenes
, particularly during eye movements, exposure to loud noises or movement from a well-lit to a darkened room.
Binary coded words have been transmitted via internet from an emitter's brain located in India and equipped with an EEG cap allowing the real-time analysis of signals from cerebral activity, into a receptor's brain located in Strasbourg, who was stimulated by a robotized Transcranial Magnetic Stimulation system, triggering or not phosphenes
(flashes of light), for de-coding the message.
The subjects experienced this as phosphenes
, flashes of light in their peripheral vision.
Acouphenes (sifflements auditifs) et des phosphenes
(vision de points lumineux) - Vertiges.
You see these phosphenes
after you see something bright, or when you come into the light after being in a dark room like a movie theater or a mine shaft.
Images seen with eyes closed included phosphenes
, geometric patterns (waves, stars, DNA-like structures, fractals), afterimages and, in one case, an image of a person.
Dr Lauren Ayton, from the Centre for Eye Research Australia said: "With the prototype the idea is to stimulate the retina to give little spots of light, which are called phosphenes
, and so, with her implant, Di will be able to see a number of spots in different locations and will be able to see things like shapes and the edges of doorways and objects like that eventually.
produced by electrical stimulation of human occipital cortex, and their application to the development of a prosthesis for the blind.
Un intentionnaliste pourrait retorquer que dans la perception il y a bien une marge d'erreur representee par la vaste gamme d'illusions et d'hallucinations perceptives : batons casses dans l'eau, pieces apparemment elliptiques, tours carrees qui "deviennent" rondes, phosphenes
, mirages .
Such experiences of seeing light when light is not actually entering the eye are known as phosphenes
One possibility is that rubbing or pressing the eye may stimulate the optic nerve endings and evoke so-called phosphenes
, sensations of light at the cortical level (Fazzi et al.
Malotki lists 15 "human universals," called phosphenes
, found in rock art around the world.