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 Frequently Asked Questions
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This section is divided into two pages. The first, 'Principal Sight Defects',
offers information relating to eyesight in general, and the second answers
a number of common questions about contact lenses. Contact Lenses FAQs |
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Principle Sight Defects |
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If you have any questions or concerns about your sight the first person to see is a
qualified optician. They will be able to conduct a sight test to see if your
sight requires correction and an eye examination to check its general health. It
is generally recommended that you have a sight test and examination at least
every two years. Short Sightedness (Myopia) |
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If you are short sighted, you’ll find that reading and close work is not usually a problem
but that your distance vision is blurred. This happens because the lens in your
eye focuses the image in front of the retina (the light receptor at the back of
the eye). Minus power lenses (lenses that are thinner at the centre and thicker
at the edge) will correct the problem very easily. If you have a larger
prescription, you will find special Thin & Light lenses will make your
lenses thinner, lighter and flatter than conventional lenses.
Back to the top |
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Long Sightedness (Hypermetropia) |
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If you are long sighted, you’ll find that your distance vision is not usually a problem but
focussing on close work is difficult and generally blurred. This often shows
itself with headaches caused by your eyes struggling to focus close up. This
happens because the lens in your eye focuses the image behind the retina (the
light receptor at the back of the eye). Plus power lenses (lenses that are
thicker and more inclined to bulge at the centre and thinner at the edge) will
correct the problem very easily. Thin & Light lenses will make your lenses
thinner, lighter and flatter than conventional lenses.
Back to the top |
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Astigmatism Astigmatism is usually caused by an irregularity in the shape of the eyeball (it’s shaped slightly like a rugby ball rather than a football) or the eyes own lens (the crystalline lens). Astigmatism shows itself in more subtle ways. You may find that if you were to look at the spokes of a wheel or numbers on a clock, some might be clearer than others. A special toric lens corrects the problem. Back to the top |
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Difficulty with close work in middle age (Presbyopia) If you have never worn spectacles before, the onset of presbyopia can seem to show the same symptoms as long sightedness. You’ll often find that reading small print becomes difficult, especially at the end of the day or in poor light. Some people become quite concerned but there’s no need to worry, it’s perfectly natural and happens to the majority of people in their middle to late forties. Back to the top |
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Reading Spectacles As the images show, you can wear simple reading spectacles which correct the problem with near vision. The only problem is that they blur distance vision, so to see in the distance, you have to peer over the top of your spectacles. 
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Bifocals Notice that bifocals give clear near vision (through the bifocal segment) and clear distance vision (through the rest of the lens). There is an appearance price to pay as many people feel they look unattractive, with an unsightly line across the lenses. Bifocal lenses correct for only two distances, near and distance, whereas in later life intermediate (arms’ length) vision needs correcting too. This can give wearers real problems as they get older. 
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Varilux Varilux lenses give instant clear vision at all distances, from near to far and in-between. They do this without the need for an unsightly bifocal segment. As the picture shows, Varilux look like normal single vision lenses. If you would like to know more about Varilux lenses, click on the word Varilux in the heading above. 
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