“His eyes were abnormally large, and round like those of a cat. The pupils, too, upon any accession or diminution of light, underwent contraction or dilation, just such as is observed in the feline tribe. In moments of excitement the orbs grew bright to a degree almost inconceivable; seeming to emit luminous rays, not of a reflected but of an intrinsic lustre, as does a candle or the sun; yet their ordinary condition was so totally vapid, filmy, and dull as to convey the idea of the eyes of a long-interred corpse.”

—Edgar Allen Poe, A Tale of the Ragged Mountains.