Error Refraction Uncorrected
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Types Refractive Errors
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Refractive Error Treatment
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Refractive Error In Children
SubstancePubMedPubMed HealthSNPSparcleSRAStructureTaxonomyToolKitToolKitAllToolKitBookToolKitBookghUniGeneSearch termSearch Advanced Journal list Help Journal ListCommunity refractive error measurement Eye Healthv.20(63); 2007 SepPMC2040245 Community Eye Health. 2007 Sep; 20(63): 37–39. PMCID: PMC2040245Uncorrected
Refractive Errors Of The Human Eye
refractive error: the major and most easily avoidable cause of vision lossMonitoring Editor: Brien A HoldenBrien A Holden, Executive Chair, International Centre http://www.lcif.org/EN/our-work/sight/uncorrected-refractive-error.php for Eyecare Education; Chair, WHO Refractive Error Working Group; Scientia Professor, University of New South Wales, Sydney NSW 2052, Australia. Copyright and License information ►Copyright © 2007 International Centre for Eye Health, LondonThis article has been cited by other articles in PMC.In the late 1990s, http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2040245/ two papers from very different parts of the world, Australia and India, highlighted the fact that uncorrected refractive error was a significant cause of blindness and the major cause of impaired vision.1,2 Since then, the World Health Organization (WHO) and the International Agency for the Prevention of Blindness (IAPB), both separately and in their joint initiative, VISION 2020: The Right to Sight, have worked very hard to put uncorrected refractive error on the blindness prevention agenda and to develop strategies for the elimination of this most simple avoidable cause of vision loss. They have been joined in these efforts by international non-governmental development organisations with expertise or programmes in this field, such as the International Centre for Eyecare Education (ICEE), Sightsavers International (SSI), Christian Blind Mission (CBM), Helen Keller International (HKI), and t
367.0-367.2-367.9 DiseasesDB 29645 MeSH D012030 [edit on Wikidata] Refractive error, also known as refraction error, is a problem with focusing of light on the retina due to the shape of the eye.[1] The most https://en.wikipedia.org/wiki/Refractive_error common types of refractive error are near-sightedness, far-sightedness, astigmatism, and presbyopia. Near-sightedness results in far objects being blurry, far-sightedness result in close objects being blurry, astigmatism causes objects to appear stretched out or blurry, and presbyopia results in a poor ability to focus on close objects. Other symptoms may include double vision, headaches, and eye strain.[1] Near-sightedness is due to the length of the refractive error eyeball being too long, far-sightedness the eyeball too short, astigmatism the cornea being the wrong shape, and presbyopia aging of the lens of the eye such that it cannot change shape sufficiently. Some refractive errors are inherited from a person's parents. Diagnosis is by eye examination.[1] Refractive errors are corrected with eyeglasses, contact lenses, or surgery. Eyeglasses are the easiest and safest method error refraction uncorrected of correction. Contact lenses can provide a wider field of vision; however are associated with a risk of infection. Refractive surgery permanently changes the shape of the cornea.[1] The number of people globally with refractive errors has been estimated at one to two billion. Rates vary between regions of the world with about 25% of Europeans and 80% of Asians affected.[2] Near-sightedness is the most common disorder.[3] Rates among adults are between 15-49% while rates among children are between 1.2-42%.[4] Far-sightedness more commonly affects young child and the elderly.[5][6] Presbyopia affects most people over the age of 35.[1] The number of people with refractive errors that have not been corrected was estimated at 660 million (10 per 100 people) in 2013.[7] Of these 9.5 million were blind due to the refractive error.[7] It is one of the most common causes of vision loss along with cataracts, macular degeneration, and vitamin A deficiency.[8] Contents 1 Classification 2 Risk factors 2.1 Genetics 2.2 Environmental 3 Diagnosis 4 Management 5 Epidemiology 6 References 7 External links Classification[edit] An eye that has no refractive error when viewing distant objects is said to hav