The eye is a marvel in miniature. Just an inch [24 mm] in diameter and one fourth of an ounce [7.5 g] in weight, it is ingeniously engineered. For example, it has separate systems for dim and bright lighting, so that 30 minutes after entering a dark room, your eyes may become 10,000 times more sensitive to light.
Read the entire article "Nature Had It First" at
http://wol.jw.org/en/wol/d/r1/lp-e/102010085#h=3:0-8:317
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“Thousands of neurons belonging to more than 30 different groups are needed to produce the movements of our eyelids,” explains Spain’s El País newspaper.
Read the entire article "The Blink of an Eye" at
http://wol.jw.org/en/wol/d/r1/lp-e/102003769#h=16:0-17:811
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Some researchers estimate that people who can see well gain approximately 80 percent of their information about the world through their eyes. In combination with our brain, our eyes enable us to see in full color, to track moving objects and images smoothly, to recognize patterns and shapes, and to see in three dimensions. Furthermore, we can see in varying degrees of light.
The latter involves a number of complementary mechanisms. For example, the pupil can expand from 0.06 inch to 0.3 inch (1.5 mm to 8 mm) in diameter, resulting in a possible 30-fold increase in the amount of light entering the eye. The light then passes through the lens, which focuses it onto the retina, concentrating the light energy by a factor of 100,000 times.
Read the entire article "Appreciate Your Special Gifts - The Human Eye" at
http://wol.jw.org/en/wol/d/r1/lp-e/102011162#h=17:0-21:325
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