VIDEO-How animals see the world

First entry: 17 July 2014 - 14:50 Athens, 11:50 GMT

Last update: 31 July 2014 12:14 Athens, 09:14 GMTSpecials

VIDEO-How animals see the world

VIDEO-How animals see the world

Humans are trichromats -meaning that our eyes have three types of the photoreceptors known as cone cells, which are sensitive to the colours red, green, and blue.

A different type of photoreceptors, called rods, detect small amounts of light; this allows us to see in the dark.

Animals process light differently -some creatures have only two types of photoreceptors, which renders them partially colorblind, some have four, which enables them to see ultraviolet light, and others can detect polarized light, meaning light waves that are oscillating in the same plane.



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