American Association for the Advancement of Science, Science, 6538(372), p. 150-156, 2021
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Dating the ipsilateral visual pathway In primates, visual connections are bilateral: Each eye sends neural connections to both sides of the brain. Vigouroux et al. looked at the evolutionary underpinnings of the bilateral visual system. A close look at the connections between the retina and the brain in a variety of fish species representing a span of evolutionary divergence revealed that contralateral connections seem to be universal. The ipsilateral connections, which add to the contralateral connections to form a bilateral visual system, arrived later in evolution but before the transition to land-dwelling animals. Science , this issue p. 150