Do you understand your eyes?
By wxc6822
@wxc6822 (185)
China
March 11, 2009 6:20am CST
Human eyes are so sensitive that on a clear night when there is no moon,a person sitting on a mountain peak can see a match struck 50 miles away.
Blue eyes are the most sensitive to light,dark brown the least sensitive.
The pupil of the eye expands as much as 45 percent when a person looks at something pleaseing.
what color are your eyes?
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