Vision shapes how many animals find food, avoid danger and navigate their world. In animals with two eyes, eye placement is often linked to lifestyle: predators such as lions tend to have forward-facing eyes that help them judge distance, while prey animals such as deer typically have eyes positioned on the sides of the head, providing a wider view of their surroundings. Eye placement can reveal much about ecology, yet most of what we know comes from animals with only two eyes. Spiders present a fascinating challenge to this picture. Most species possess eight eyes, arranged in remarkably diverse configurations, raising the question of how these patterns relate to hunting strategy.

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