Sight and hearing were the only two senses that, like two solitary sparks, animated this poor human body that was so near the grave. His hair was white and long, reaching down to his shoulders, while his eyes were black, overshadowed by black eyebrows, and, as is generally the case when one organ is used to the exclusion of the others, in these eyes were concentrated all the activity, skill, strength, and intelligence which had formerly characterized his whole body and mind. It is true that the gesture of the arm, the sound of the voice, the attitude of the body were now lacking, but his masterful eye supplied their place. He commanded with his eyes and thanked with his eyes; he was a corpse with living eyes

— Alexandre Dumas, The Count of Monte Cristo, Barnes & Noble, p. 487, 2011