Science

Seeing is believing!

Everyone has a BLIND SPOT in their vision of each eye.

Take the test to find it for yourself !!

Look at graphic of the cross and the circle at the top of this post.

Sit at your computer with your nose pointing in between the cross and the black circle.

Cover your LEFT eye and stare at the cross with your RIGHT eye.

Now SLOWLY move towards the computer screen while still staring at the cross with your RIGHT eye.

At some stage the black circle will disappear and the area where the black circle was…will now be all white – this is your BLIND SPOT.

If you move closer to the screen or farther away –  the circle will re-appear.  At just the right distance – the circle will disappear.

Now try the OTHER eye…but this time cover your RIGHT eye and look at the CIRCLE with your LEFT eye…..move closer and you will see that the CROSS now disappears!!

Your eye has a lining called the RETINA. Photoreceptors are cells in the retina that detect light and allow you to perceive “vision”. There is a “hole” in this lining where the Optic Nerve enters the eye where there are NO photoreceptors. This is your “Blind Spot”.  Every eye has a blind spot….your blind spot in your right eye is slightly on your right and your blind spot in your left eye is slightly on your left.

Your brain automatically “fills in” the blind spot area for you…..

Now try the one bleow: