phosphene: Meaning and Definition of

phos•phene

Pronunciation: (fos'fēn), [key]
— n. Physiol.
  1. a luminous image produced by mechanical stimulation of the retina, as by pressure applied to the eyeball by the finger when the lid is closed.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.