Double vision is where you see two images of a single object. It is sometimes confused with blurred vision. If you have blurred vision, a single image will appear, but will be unclear, whereas if you have double vision you will see two images at the same time.
Double vision may be constant, it may come and go, or it may only occur when you are looking in a particular direction.
A weakness in the muscles on either side of your eyeball can cause horizontal double vision, where you see two images side by side, when you are looking in a particular direction (to the left or right). It can also cause your eyes to appear ‘crossed’, or as if they are wandering.
You should visit your GP as soon as possible if you have developed double vision. If you have not had double vision before, it is very important that you contact your GP immediately. It could be a symptom of a serious medical condition.
Recognising double vision in children
Whereas adults are able to describe what is happening with their sight, young children may not be able to explain clearly what is wrong.
If your child has double vision, they may narrow or squeeze their eyes in an effort to see, or they may frequently cover one eye with their hand. They may also turn their head in unusual ways or look sideways instead of facing forward.
Sometimes, children may also look between the two images. However, they usually quickly learn to ignore one image. This process is called suppression and can lead to permanent loss of vision in that eye (amblyopia).
If you suspect that your child has double vision or a squint (ocular misalignment), take them to see your GP as soon as possible. It is very important that the condition is diagnosed and treated quickly.
