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Home Eye Tests Glasses Eyesight Problems Eye Diseases Contact Lenses FAQs



What is short sighted ?

Far distance vision is blurry. Its easier to see at shorter distances than far, hence the term short sighted.

The scientific term is Myopia and a short sighted person with this condition is said to be myopic.


Why does short sight occur ?

Peoples eyeball length varies and if its too long for the power of the eye, then an image falls in front of the retina.  The image will then pass onto the retina but will be out of focus.  


Treatment of short sight

Short sighted is corrected by glasses or  contact lenses. Surgical treatment is also possible.

An optical lens placed in front of an eye, can alter the path of an image. A concave shaped lens will bend the light away - diverges - so that rays of light can now fall onto the correct position on the  retina instead of before it.

The optician can determine the correct strength of the lens that is needed to do this. A higher number value means more powerful lenses.

A concave lens is measured in minus figures - and the unit of measure is Dioptres.

For example, a low prescription may be -1.50 Dioptres and a high prescription may be -7.50 Dioptres.



Symptoms of Short Sight

Blurred vision in distance  e.g. school board, road signs , TV  

Short sight may cause eyestrain and tiredness esp if person is narrowing lids to try to make things clearer.

May be able to read and use VDU without any problems - but for some, even VDU and reading can be blurred if they are very short sighted.

Remember, best to seek medical advice as symptoms can be caused by other eye conditions


Will my short sighted vision get worse ?

The eye naturally changes. A common pattern is that the short sight tends to get worse during childhood esp teenage period up to young adult hood. It usually settles down by then, and remains steady - but can then improve a little bit in mid life. It may then get worse again later in life.

The onset of short sight can be a factor - usually the prescription is higher if spectacles were needed during early  childhood.

There is adult onset myopia - which may occur in early twenties - and thought to be due to prolonged close work such as studying, administration work and VDU. The prescription tends to be lower though and usually does not have large increases year to year.


Causes of Short Sight

Many factors such as diet, prolonged close work and genetics can cause short sight .  For example in poorly controlled diabetes, it can cause temporary short sight shifts ( as well as possibly diabetic eye disease changes )  

Wearing the full correction during childhood has been shown to help. Even though the prescription may go up, the rate of change was less than children not wearing the full correction.

Taking regular breaks from prolonged close work such as VDU  may ease the short sighted progression.