Thursday, July 5, 2012

New and interesting facts about Human eye

Facts about Human eye:

  • Human eyes are the most complex organs except brain.
  • Human eyes are composed of more than 2 million working parts
  • The average person blinks 12 times per minute – about 10,000 blinks in an average day
  • Human eyes can process 36,000 bits of information every hour.
  • Only 1/6th of human eyeball is exposed to the outside world
  • 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.
  • Colour blind people do see color but confuse certain colors in certain conditions.
  • Red and Green are the most commonly confused colours among colour blind people.
  • Colour blindness is 10 times more common in males than females
  • The eye is the only part of the human body that can function at 100% ability at any moment, day or night, without rest.
  • Human eyelids and the external muscles of your eyes need rest, the lubrication of your eyes requires replenishment, but your eyes themselves never need rest.
  • Human eyelashes have an average life span of 5 months.
  • The eyeball of a human weighs approximately 28 grams.
  • The eye of a human can distinguish 500 shades of the gray.
  • People generally read 25% slower from a computer screen than from paper.
  • Men are able to read fine print better than women can.
  • The reason why your nose gets runny when you are crying is because the tears from the eyes drain into the nose.
  • It is impossible to sneeze with eyes open.
  • Human eye will focus on about 50 things per second.
  • Human retina contains 120 million rods for "night vision", and 8 million cones that are colour sensitive and work best under daylight conditions.
  • Human Eyes contribute towards 85% of total knowledge.
  • About half of the brain is involved in the seeing process. Humans are very much visual animals.
  • Under the right conditions, the human eye can see the light of a candle at a distance of 14 miles.
  • The cornea is the only part of the human body that has no blood supply.

  • The average adult blinks at a rate of 10 to 20 times per minute. With an average of 4,200,000 blinks a year.
  • Humans are the only animal on the planet to show the white of their eyes.
  • Vastly more men suffer colour blindness than women. All babies are colour blind when they are born. The primary cause of blindness in adults in the United States is diabetes.
  • The human eye can distinguish 500 shades of the gray and can detect over 10 million colors.
  • Involuntary eye muscle spasms are a symptom of those suffering with blepharospasms.
  • An average adult eye weighs approximately 1 oz.
  • A fingerprint has 40 different unique characteristics an iris has 256, hence the growing use of iris scans for security purposes.
  • Is about 100,000 times more sensitive to light in darkness than they are in bright daylight.
  • People with blue eyes are better able to see in the dark than people with darker ones.
  • Healthy eyes are so sensitive to light that a candle burning in the dark can be detected 1.6km (1 mile) away.
  • The human eye can distinguish about 10 million different colors.
  • The cornea in eye is the only living tissue in the human body that does not contain any blood vessels.
  • 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.
  • Vitamin A can help to improve eyesight because it is needed by retina for forming specific metabolite.

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