资料来源 : pyDict

视网膜像

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Optogram \Op"to*gram\, n. [Optic + -gram: cf. F. optogramme.]
   (Physiol.)
   An image of external objects fixed on the retina by the
   photochemical action of light on the visual purple. See
   {Optography}.