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What's in your eye?

January 2019

The human eye is an amazing organ. Here we take a look at what’s actually happening inside your eye.

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The secret to the magic of the human eye is light. Light bounces off everything around you and then into your eye. It passes through a thin veil of tears, then through your cornea. This clear layer helps to focus light before it reaches the retina.

The retina sits at the back of your eye, and light is projected onto it like a projector.

Feh Upside Down

Did you know the human eye actually sees upside down?

There are some amazing facts about the human eye, too. Did you know, our curved corneas mean we actually see the world upside down? Then our brain flips the image the right way up. Isn’t that unbelievable?

And having 20/20 vision just means you can read a chart from 20 feet (6m) away in normal lighting. It’s possible to have 20/10 vision, which means you can see at 20 feet (6m) what most people can only see at 10 feet (3m)!

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20/20 vision means you can read a chart from 20 feet (6m) away in normal lighting

So why do things go wrong sometimes?

The eye is a delicate, complicated organ and sometimes, a person’s vision can be far from 20/20. At Orbis, our work focuses on the blindness we can treat or cure – like cataract, trachoma and diabetic retinopathy.


Enjoyed lifting the lid on the human eye?

There are plenty of places to learn more about this amazing organ, and how you can help protect and restore the sight of people all around the world, on our website.