phosphene

[ fos-feen ]
/ ˈfɒs fin /

noun Physiology.

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.

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Origin of phosphene

1870–75; <French phosphène, irregular <Greek phôs light (contraction of pháos) + phaínein to show, shine
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for phosphene

phosphene
/ (ˈfɒsfiːn) /

noun

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

Word Origin for phosphene

C19: from Greek phōs light + phainein to show
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for phosphene

phosphene
[ fŏsfēn′ ]

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.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.