article_snippet: Light travels through a mass of neurons before Light reaches the 'back'. '
  
article_snippet: neurons and cell nuclei process the image information and transmit the image information to the brain, but
article_snippet: This is a long-standing puzzle, even more so since the same structure, of neurons before light detectors, exists in all vertebrates, showing evolutionary stability.
highlights_snippet: Light travels through a mass of neurons before Light reaches the 'back