a sensation of light produced by mechanical or electrical stimulation of the retina, as by pressure on the eyeball through the closed eyelid
Origin of phosphenefrom Classical Greek ph?s, light (see phosphorus) + phainein, to show (see fantasy)
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.
Origin of phospheneFrench phosphène Greek phōs light ; see phos- . Greek phainein to cause to appear, to show ; see bhā-1 in Indo-European roots.