Phosphene

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Phosphene \Phos"phene\ (f[o^]s"f[=e]n), n. [Gr. fw^s light +
     fai`nein to show.] (Physiol.)
     A luminous impression produced through excitation of the
     retina by some cause other than the impingement upon it of
     rays of light, as by pressure upon the eyeball when the lids
     are closed. Cf. {After-image}.


     [1913 Webster]