The eight eyes of a jumping spider provide it with excellent vision via two principal eyes used for stereoscopic vision and the other six for a panoramic view around the spider.

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"Jumping spiders are said to have the best vision of all invertebrates. They catch their prey by ambush, and the large eyes placed close together in the front of the head give accurate stereoscopic vision for judging distance when pouncing. The remainder of its eight eyes give it almost all-round vision, so it can spot prey moving anywhere near it." (Foy and Oxford Scientific Films 1982:73)

The grand design: Form and colour in animalsJanuary 23, 1983
Sally Foy

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