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When one eye is better than two

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  • Mandyam V. Srinivasan

    (the Centre for Visual Sciences, Research School of Biological Sciences, Australian National University)

Abstract

You wouldn't expect there to be many similarities between the chameleon (a reptile) and the sandlance (a fish), yet it seems that they use similar visual systems. Both can move their two eyes independently and alternately, and both use their cornea (rather than the lens) to focus on objects. These refinements allow them to gauge depth and distance with one eye, and must have evolved separately in the two species in response to environmental constraints.

Suggested Citation

  • Mandyam V. Srinivasan, 1999. "When one eye is better than two," Nature, Nature, vol. 399(6734), pages 305-307, May.
    • Handle: RePEc:nat:nature:v:399:y:1999:i:6734:d:10.1038_20550
    DOI: 10.1038/20550
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