Well eye never!

1st September 2021

Here are 10 fascinating facts about the human eye.


  1. Your eyes focus on 50 different objects every second.
  2. The only organ more complex than the eye is the brain.
  3. Images entering the eye are upside down but the brain turns them right side up.
  4. The optic nerve contains more than one million nerve cells.
  5. Your iris (the coloured part of your eye) has over 256 unique characteristics; your fingerprint has just 40.
  6. The eyes are responsible for 80% of all the information our brain receives.
  7. We produce over 1 litre of tears every year to keep our eyes lubricated. This doesn’t include emotional tears produced when we cry.
  8. Your retina is one of the highest oxygen-consuming tissues in your body.
  9. The eye weighs only about 28 grams.
  10. An eyelash has a lifespan of about 5 months.

Finally, did you know our eye muscles are the fastest muscles in our body? Hence perhaps where the saying ‘it happened in the blink of an eye’ comes from!

The Gordon Turner Optometrists Team