Adaptations to night vision include the large size of the eye, its tubular shape, large numbers of closely packed retinal rods, and an absence of cone cells, since rod cells have superior light sensitivity.
Alternate versions of the story include Napoleon being unhappy about losing to the machine, playing the machine at a later time, playing one match with a magnet on the board, and playing a match with a shawl around the head and body of the Turk in an attempt to obscure its vision.
Although their accommodation of 11 dioptre is comparable to that of humans and they see well in twilight because of the tapetum lucidum behind the retina, visual perception is of subordinate importance to raccoons because of their poor long-distance vision.
An admitted perfectionist, Ueda felt that only one or two out of 500 artists who applied to work on Shadow of the Colossus met his criteria, and often demanded thorough changes in design until it matched his vision.
Due to polymorphism in opsin genes, which code for color receptivity, trichromatic vision may rarely occur in females of a few lemur species, such as Coquerel's sifaka (Propithecus coquereli) and the red ruffed lemur (Varecia rubra).
Hence, it would be of adaptive value in caves, with no vision available, to profit from underwater hearing by recognizing particular sounds and eventual localization of prey or other sound sources, i.e. acoustical orientation in general.