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Nature 423, 387-388 (22 May 2003) | doi:10.1038/423387a
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Vision: The retina's fancy tricks
Richard H. Masland
Abstract
The vertebrate eye is far more than a passive receptor for visual information. The microcircuitry in the retina can, for instance, carry out the job of distinguishing object motion from background motion.
When the first light-sensitive amoeba drifted down a stream, it encountered one of the fundamental problems of vision, which is that the world doesn't sit still. Trees move in the breeze, grass rustles, the sun and stars drift across the sky.
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