Myopia

Or 'Short Sight'

Myopia is often known as short-sight or near-sight, and is one of the most common eye conditions. It occurs when the eyeball is long in relation to the curvature of the cornea, meaning that distant objects appear blurred.

Myopia is often corrected by the use of glasses

How do I know I’m short sighted?

If you have trouble seeing objects at a distance, you are probably short sighted. Short sight is usually identified during childhood, often when children have to sit at the front of the class so they can see the blackboard or whiteboard. People with uncorrected short sight may also suffer from headaches.

Causes of Myopia

Myopia often runs in families but seems to be on the increase. The increase could be due to us relying on computers and smartphones, continually looking at screens at very close range.

How short sighted am I?

The correction of long and short sight is measured in dioptres, often abbreviated to D. Dioptres are the unit of focusing power your eyes need to be able to see clearly. Higher numbers indicate poorer eyesight and a need for stronger glasses or lenses. Prescriptions for short sighted people always have a negative number of dioptres, while long sighted people have a positive number.

Your prescription might read -3.00D which would mean you need a lens of three dioptres to correct your short sightedness.

How does a short-sighted eye see?

How does a short-sighted eye see?

The eye sees by allowing light to pass through the cornea to focus on the retina. The retina is made of light-sensitive tissue, from which the picture is sent along the optic nerve to the brain.

If you have myopia, or short sight, your corneas are curved in such a way that the light focuses just in front of the retina, instead of directly upon it. This means that when you look at distant objects, a blurred image is sent to your brain.

How to correct myopia or short sight

Glasses, contact lenses and laser eye surgery are all recognised ways of correcting myopia.

It is worth remembering that, if you have a very high prescription (more than -8.00D) LASIK might not be suitable for you. However, the implantable collamer lens (ICL) or refractive lens exchange (RLE) are possible alternatives and, like LASIK, will give you freedom from glasses. Our clinicians will find the best procedure for you, based on your medical history, examination findings and individual requirements.