Refraction: a test for spectacles David Kinshuck |
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What is a 'refraction' test |
This is a test to measure your eyesight for glasses. It is the name of the test you have at your local optometrist. However, the hospital specialises in refractions for people with problems such as poor vision, or double vision. The test takes 20 - 30 minutes. Please bring you glasses with you, even if they are out of date, as they still help the hospital optician decide if you need a new pair. The test will be carried out by one of the optometrists in the department. If you do need new glasses you will be given a prescription. Take the prescription to your local optometrist to have your glasses made. The hospital optometrist will advise if you are entitled to NHS glasses before you take your prescription. When you collect your new glasses give yourself several days to settle down to the new lenses, especially if you plan to work or drive. The refraction in the hospital is only available if you attend the Eye Clinic. If you are discharged you should consult your local optician if you need an eye examination.
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Refractive error |
You may need glasses if you are long-sighted (hypermetropic),
short-sighted (myopic) or have astigmatism in one or both eyes. See this page, BBC
See refraction animation , presbyopia animation,
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Light focuses behind the eye; the eye is usually
shorter than average.
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Your eye is slightly longer than average. The retina lines the back of the eye like wall paper; it is the 'film' of the eye. As the retina is 'stretched' if you are myopic, retinal disturbances are slightly more likely. BBC. Wilkipedia
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This occurs when the shape of the eye is more like that of a rugby ball than that of a football. You will need glasses to see clearly, otherwise your sight will be blurred. diagram text BBC
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As you get older, the lens of our eyes becomes rigid and cannot changes its focus. You need glasses for reading to make reading images focus on your eye (or at least different glasses for reading). See presbyopia animation & www.contactlenses.co.uk |
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Refractive surgery |
Many people ask ophthalmologists for advice about refractive surgery, and opinions vary widely. If you want refractive surgery, read up...here are the NICE reports. Here are some useful points
that may help some people decide. Many people have now had refractive
surgery, and most are very pleased. Mind you, very few of these are ophthalmologists.
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The address of this site ('org' changing to 'nhs') is changing from http://www.goodhope.org.uk/departments/eyedept/ to http://www.goodhope.nhs.uk/departments/eyedept/ |
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