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. [French phosphène : Greek ph  s, light; see phos- + Greek phainein, to cause to appear, to show; see bh -1 in Indo-European roots.] |
phosphene [ˈfɒsfiːn]
n
(Life Sciences & Allied Applications / 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
[from Greek phōs light + phainein to show]
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