Are you right or left-eyed?

sms eyes


We’ve put together a little collage of our science made simple eyes above to make some quite freaky faces. But, have you ever stopped to think why we (and most mammals) have two eyes?

In fact, having two of any organ is normally very useful in improving out perceptions of the world. Our brain uses our eyes to actually do some clever calculations, in order to work out the distance of an object in front of us. This is not to say that two eyes are essential to seeing – people who are blind in one eye still manage perfectly fine. What you may not know, however, is that our eyes normally grow to become different strengths, and much like people are right- or left-handed, they are often also right or left eyed! You can test this out yourself…


Try this…

Make a circle with your thumb and first finger. With both eyes open look at an object on the wall or in the distance, and centre it inside the circle. Now close one eye, and then the other.

What’s happening?

When you closed your left or right eye you should have found that the object jumps outside the circle. If the object seemed to move when you closed your left eye, then you have left eye dominance. If the object moved more when your right eye was closed, then your right eye is the dominant one.

Your brain builds up an image of the world around you using slightly different views from your right or left eye. Most people tend to have a dominant eye so that even when both eyes are open, one is giving priority information.

The object you chose was lined up to be in the circle using information from your dominant eye. When you close this one you can see that the object was not lined up for your other eye.

About 80% of the population are right-eyed, and a very small percentage seem to have no eye-dominance at all.

So what?

If you take part in any sport that involves shooting at a target (eg. archery or darts) then knowing your eye-dominance is very helpful. Left eyed people should shoot with their left hand, and right eyed people with their right hand, in order to improve their aim.


(PS – Did you notice in our photo above, that one of our presenters actually has different coloured eyes! That’s right, our busking expert David was born with a rare chromosome abnormality, which make his irises different colours!)


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