By Susan Milius
Eight of the eyes on a box jellyfish have surprisingly good lenses, yet the structure of the eyes keeps them from focusing sharply, according to a new optics study.
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Sharp focus may be what people and most other vertebrates want out of their lenses, but box jellyfish thrive with fine lenses and a blurry, wide picture, say Dan E. Nilsson of Lund University in Sweden and his colleagues in the May 12 Nature.