As it turns out, many blind people, people with no visual perception of light at all do have the same sleep cycle as sighted people.

但是很多盲人，那些完全失去视力的人确实和视力好的人有同样的睡眠周期。

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As it turns out, many blind people, people with no visual perception of light at all, do have the same sleep sike as the sighted people.

据证实，许多无光感的盲人确实有和正常人一样的睡眠节律。

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Somehow, the eyes of these subjects, even though they were damaged and had no visual perception of light, could tell their brain (whether it's) when there was more or less light.

这样一来，尽管眼睛受损害失去视觉，这些人的眼睛可以告知大脑是更多或是较少的光线。

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More than just a static show of lights, this collection throws our perception of light and space, encouraging the audience to touch, feel, stand and bathe in it.

BBC: Look on the bright side at London��s light show

Usually not by much, but enough to give us things like color, which is a result of our perception different wavelengths of light being scattered by objects or media or both.

FORBES: Slowing the Speed of Light to a Crawl

The Republican response reflected in part a continuing split between conservatives resisting concessions to the president and GOP moderates trying to buff up the party's tarnished reputation in light of a growing public perception of congressional dysfunction.

CNN: January 22, 2013 -- Updated 2328 GMT (0728 HKT)