The Collaborative International Dictionary of English v.0.48:

Chromophane \Chro"mo*phane\, n. [Gr. ? color + ? to show.]
   (Physiol.)
   A general name for the several coloring matters, red, green,
   yellow, etc., present in the inner segments in the cones of
   the retina, held in solution by fats, and slowly decolorized
   by light; distinct from the photochemical pigments of the
   rods of the retina.
   [1913 Webster]