Amazing facts

Tuesday, March 25, 2008

Did you know?

  • Eyes:
    • Contribute towards 85% of your total knowledge.
    • Are the most complex organs you possess except for your brain.
    • Are composed of more than two million working parts.
    • Can process 36,000 bits of information every hour.
    • Under the right conditions, can discern the light of a candle at a distance of 14 miles.
    • Utilize 65% of all the pathways to the brain.
    • Can instantaneously set in motion hundreds of muscles and organs in your body.
  • In a normal life-span, will bring you almost 24 million images of the world around you.
  • The average person blinks about 12 times a minute. That's an amazing 10,080 blinks in a kids day (14 waking hours). That's why when someone says "it happened in the blink of an eye," they mean it happened really fast.
  • The external muscles that move the eyes are the strongest muscles in the human body for the job that they have to do. They are 100 times more powerful than they need to be.
  • The adult eyeball measures about 1 inch (2.5 cm) in diameter. Of its total surface area only one-sixth is exposed -- the front portion.
  • The eye is the only part of the human body that can function at 100% ability at any moment, day or night, without rest. Your eyelids need rest, the external muscles of your eyes need rest, the lubrication of your eyes requires replenishment, but your eyes themselves "never" need rest. But please rest them!
  • If something is about to hit our eye, we will blink automatically.
  • Our eyebrows are made to keep sweat from running into our eyes.
  • The eyeball of a human weighs approximately 28 grams/an ounce.
  • The eye of a human can distinguish 500 shades of the gray.
  • The cornea is the only living tissue in the human body that does not contain any blood vessels.
  • The shark cornea has been used in eye surgery, since its cornea is similar to a human cornea.
  • Sailors once thought that wearing a gold earring would improve their eyesight.
  • People generally read 25% slower from a computer screen compared to paper.
  • Men are able to read fine print better than women can.
  • All babies are colour blind when they are born.
  • Babies' eyes do not produce tears until the baby is approximately six to eight weeks old.
  • The reason why your nose gets runny when you are crying is because the tears from the eyes drain into the nose.
  • Some people start to sneeze if they are exposed to sunlight or have a light shined into their eye.
  • The most common injury caused by cosmetics is to the eye by a mascara wand.
  • It is impossible to sneeze with your eyes open.
  • The space between your eyebrows is called the Glabella.
  • Our eyes may be BLUE, BROWN, GREEN, GRAY OR BLACK, because that is the color of the iris.
  • an eye is only 2.3 centimeter long on average
  • The eye lens sits within an envelope that is the thickness of a red blood cell.This envelope is what contains the artificial lens after a cataract operation.
  • Tears are meant to protect your eye. They contain natural antibiotics, they prevent the eye from drying out, they contain certain fats that reduce the evaporation of tears.
  • The eye makes an aqueous fluid in side it, so the eye has a certain "pressure"
  • The retina contains 120 million rods for "night vision", and 8 million cones that are colour sensitive and work best under daylight conditions
  • Light causes electric activity in the eye, that can be measured, and is sometimes used in tests to find out how the retina and the nerve of sight works.
  • Modern cataract operations have been made possible thanks to the second world war. Sir Harold Ridley, who was an ophthalmic surgeon in London, found that pilots came back from their missions with little pieces of perspex in their eye(shattered screens of the planes they were flying in), to which the eye did not seem to "object": no inflammation of any significance was found in their eye.This material was modified and further developed into artificial lenses that are used in cataract operations.
  • About half of our brain is involved in the seeing process.Humans are very much visual animals


Eyes importance

How important your eyes are!

Your eyes are at work from the moment you wake up to the moment you close them to go to sleep. They take in tons of information about the world around you - shapes, colors, movements, and more. Then they send the information to your brain for processing so the brain knows what's going on outside of your body.

We depend on sight more than any other of our senses to maneuver through the space around us. In a single glance, lasting a fraction of a second, our eyes work with our brains to tell us the size, shape, color, and texture of an object. They let us know how close it is, whether it's standing still or coming toward us, and how quickly it's moving. Every day, our eyes give us messages that help us understand the world around us.

Although the eyes are small compared with most of the body's other organs, their structure is incredibly complex. The eyes work together to perceive depth, enabling us to judge distance and the size of objects to help us move around them. Not only do the two eyes work together, they also work with the brain, muscles, and nerves to produce complicated visual images and messages. And our eyes constantly adapt to the changing environment รข€” for example, they are able to adjust so that we can easily move around in a nearly dark room or bright sunlight.

To understand more about how the eyes work, it's important to know about the structures that make up the eye and about conditions and diseases that can interfere with vision.


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