phosphene /phos·phene/ (fos´fēn) a sensation of light due to a stimulus other than light rays, e.g., a mechanical stimulus.
phosphene [fos´fēn]
phos·phene (f s f n )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. |
phosphene [fos´fēn]
an objective visual sensation that occurs with the eyes closed, and in the absence of retinal stimulation by visible light.
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.
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