10 interesting facts about our eyes

The Association of Optometrists is always offer some great advice on Eye Health, below are 10 interesting facts on eyes from the AOI.  

Our eyes are one of our most important senses, its how we take in information, but despite using our eyes every day what do you really know about your eyes?

Below are some fun facts about the Human eye!


1.    You’ve see RGB written on your TV, these are the three colours that make up the light spectrum, every colour we see is made up of these three light colours, Red, Green and Blue.

2.    Just like in your rear view window every eye has a blind-spot, it occurs where optic nerve leaves the eye, normally we not aware of it. 

3.     Technically we all have the same colour eyes, what we mean is the only colour in the human eye is a brownish pigment called melanin in the iris. The differing amount of melanin in the eye changes the colour we see. Blue eyes do not have a lot whereas brown has a large amount of melanin.

4.    Staring deep into someone’s eyes is truer that you might think, believe it or not our pupils are not actually black, its really a hole which allows light to enter the eye. It only looks black because light is not reflected back. When you see ‘red-eye’ in a photograph, it is actually light being reflected back out of the eye from the retina. 

5.    Our eyes are actually filled with a jelly-like substance called vitreous humour, this substance helps the eye to keep its shape.

6.    Did you know it actually takes up to four months for babies to learn to use both eyes together? 

7.    It’s a myth that carrots are actually good for your eyes, carrots are actually not good for the eyes; in fact, green vegetables such as spinach, cabbage and bright coloured things like peppers are better. They contain an anti-oxidant called Lutein that protects the eye. 

8.    Its important to cover the eyes with sun glasses or shade and never look directly into the Sun, the UV light from the sun can damage the surface of the eye and structures inside the eye

9.    Your pupils react together, even when you shin a light into only one eye both eyes will react the same.

10. Try this one, close one eye and try to judge distance, having trouble? that’s because our depth-perception, or the ability to see in 3D requires two eyes working together; people with only one eye or a lazy eye unfortunately do not have true depth perception.


The original article was provided thanks to the Association Of Optometrists Ireland of which all EyeZone members are full members of, to view more information about the AOI simply visit www.aoi.ie