Amazing True Facts About Your Eye

Human corneas are so similar to shark corneas that they have been used as a replacement in human eye surgery.

  • Humans and dogs are the only species known to seek visual cues from another individuals eyes, and dogs only do this when interacting with humans.

  • It's impossible to sneeze with your eyes open.

  • Pirates used to wear a gold earring because they believed it improve their eye sight.

  • The pupil of your eye expands as much as 45% when you look at someone you love.

Colour and Light

  • All babies are colour blind when they are born.

  • If your eyes are blue, you share a common ancestor with every other blue eyed individual in the world.

  • Our eyes can distinguish between 500 shades of grey.

  • One in every 12 males is colour blind

  • Brown eyes are actually blue underneath the brown pigment and as a result there exists a laser procedure to turn brown eyes blue permanently.

  • There are colours that are too complex for the human eye called ''Impossible Colours''.

  • About 2% of women have a rare genetic mutation that enables them in having an extra retinal cone in their eyes. This colour allows them to see 100 million colours.

  • Some people are born with two differently coloured eyes. This condition is heterochromia.

  • The worlds most common eye colour is brown.

  • The human eye only sees three colours red, blue and green all other colours is a combination of these.

How Your Eyes Function

  • While it takes some time for most parts of your body to warm up to their full potential, your eyes are always active 24/7.

  • Your eyes are about 1 inch across and weigh about 8 grams.

  • Out of all the muscles in your body, the muscles that control your eyes are the most active.

  • Each of your eyes has a small blind spot in the back of the retina where the optic never attaches. You don't notice the hole in your vision because your eyes work together to fill in each other's blind spots.

  • Your eyes always remain the same size once you are born.

  • There are 3 main components to our tears and they are fat, mucous and water. This is so the tears won't evaporate.

  • Only one sixth of the human eyeball is exposed.

  • In an average life, eyes see 24,000,000 different images.

  • The human eye can only make smooth (non saccadic) motions if it is actually tracking a moving object.

  • An iris has 256 unique characteristics. This is why retina scans are increasingly being used for security purposes.

  • Your eyes are comprised of over 2 million working parts to make them fully functional.

Blinking & The Speed Of An Eye

  • A blink usually lasts 100 to 150 milliseconds and it's possible to blink five times in a second.

  • People generally read 25% slower on a computer screen compared to paper.

  • Eyes can process about 36,000 bits of information each hour.

  • Your eyes will focus on about 50 things per second.

  • Eyes heal quickly. With proper care, it only takes about 48 hours for the eye to repair corneal scratch.

  • The eye blinks on an average of 17 times per minute, 14,280 times per day and 5.2 million times a year.

  • The eyes lens is quicker than any camera's.

  • Your eyes start to develop only two weeks after you were conceived.

  • The perfect length of eye contact when you fist meet someone is about 4 seconds. This is to acknowledge what colour eyes they have.

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