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Help and advice - Understanding your prescription

Posted On 27 October 2012

Conditions that can affect the eyes

There are many different conditions that can affect your eyes in lots of different ways.  You only get one pair of eyes, so make sure you look after them and know how to keep them healthy.

Myopia (short-sightedness)
Hypermetropia (long-sightedness)
Presbyopia (a normal age related change that means that our eyes are less able to focus on near objects)

What is Myopia?

Myopia is described as short sightedness.

People with myopia usually have trouble seeing distant objects (any object beyond a couple of metres).  Spectacles or contact lenses help to provide clear vision for tasks such as driving and watching television. In some cases people with myopia may need to wear their glasses all of the time.

What is Hypermetropia?

Hypermetropia is also known as long sightedness. 

People who are longsighted usually have the most difficulty when viewing near objects such as when reading or using a computer.  In some cases people with hypermetropia may need to wear their glasses all of the time.

What is Presbyopia?

Presbyopia is a normal age related change that occurs in our eyes. As we age, the lens in our eye becomes less flexible and less able to focus on near objects. 
Near vision or reading glasses are used to correct presbyopia. A near vision prescription is given in addition to a prescription to correct myopia or hypermetropia. 

Astigmatism

Astigmatism describes as condition where the light that enters the eye does not  come to a single focal point.  The vision needs to be corrected with a lens which a has two different powers in it. 

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