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Fish and many prey animals use a fundamentally different visual system to represent the world around them. Having laterally pointed eyes means that fish do not fix both eyes on a subject as humans and other predators do.
Here I visualize the world through the eyes of a fish and explain why it looks like that using currently available data.
P.s. Since fish are an extremely diverse group, their vision is thought to be too. This is just one highly generalized depiction.
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Personal blog:
m-lin-dm.github.io/
Twitter: / _michaelrlin_
SOURCES
Teleost vison seeing while growing: Fernald, Russell D. "Teleost vision: seeing while growing." Journal of Experimental Zoology 256.S5 (1990): 167-180.
Jagger, W. S. "The optics of the spherical fish lens." Vision research 32.7 (1992): 1271-1284.
Wallace, Damian J., et al. "Rats maintain an overhead binocular field at the expense of constant fusion." Nature 498.7452 (2013): 65-69.
Nityananda, Vivek, and Jenny CA Read. "Stereopsis in animals: evolution, function and mechanisms." Journal of Experimental Biology 220.14 (2017): 2502-2512.
Rat eyes while crossing a gap: • Rats have a double vie...