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Definition Of Uncorrected Refractive Error

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中文 English Français Русский Español RSS Feed Youtube Twitter Facebook Google + iTunes Play Store What is a refractive error? Online Q&A refractive error symptoms 7 October 2013 Q: What is a refractive error? A: A

Types Refractive Errors

refractive error is a very common eye disorder. It occurs when the eye cannot clearly focus the

Refractive Error Correction

images from the outside world. The result of refractive errors is blurred vision, which is sometimes so severe that it causes visual impairment. The four most common

Refractive Error Ppt

refractive errors are: myopia (nearsightedness): difficulty in seeing distant objects clearly; hyperopia (farsightedness): difficulty in seeing close objects clearly; astigmatism: distorted vision resulting from an irregularly curved cornea, the clear covering of the eyeball. presbyopia: which leads to difficulty in reading or seeing at arm's length, it is linked to ageing and occurs almost universally. refractive error treatment Refractive errors cannot be prevented, but they can be diagnosed by an eye examination and treated with corrective glasses, contact lenses or refractive surgery. If corrected in time and by eye-care professionals, they do not impede the full development of good visual function. Correction is provided in different forms according to the defect, the age f the person, the requirements in terms of work of activity performed. WHO estimates that 153 million people worldwide live with visual impairment due to uncorrected refractive errors. This figure does not include the people living with uncorrected presbyopia, which is likely to be quite significant, according to some early evidence. WHO, its Member States and partners are working to find ways to provide good quality, professionally prescribed, local, affordable corrective refraction services to people in need, especially in poor areas with limited eye care services. Related links Refractive errors and low vision Prevention of avoidable blindness and visual impairment Share Email Twitter Facebook Google Delicious LinkedIn More... Print

to the NEI Health Information Eye Health Topics Clinical Studies Publications Catalog Photos and Images Spanish Language Information News refractive error in children and Events All News Meetings and Events Grants and Funding All Grants refractive error pdf and Funding Division of Extramural Activities Division of Extramural Science Programs Funding Opportunity Announcements Funding Mechanisms Supported by the refractive error measurement NEI Research at NEI All Research at NEI Office of the Scientific Director Office of the Clinical Director Education Programs All Education National Eye Health Education Program Diabetic Eye Disease Education Program http://www.who.int/features/qa/45/en/ Glaucoma Education Program Low Vision Education Program Spanish-language Education Program (¡Ojo con su visión!) Vision and Aging Program Training and Jobs All Training and Jobs NEI Summer Intern Program Diversity In Vision Research & Ophthalmology (DIVRO) Student Training Programs NEI Home About NEI Health Information News and Events Grants and Funding Research at NEI Education Programs Training and Jobs Home https://nei.nih.gov/health/errors/errors > Eye Health Information > Refractive Errors > Facts About Refractive Errors Facts About Refractive Errors This information was developed by the National Eye Institute to help patients and their families search for general information about refractive errors. An eye care professional who has examined the patient’s eyes and is familiar with his or her medical history is the best person to answer specific questions. Refractive Errors Defined What are refractive errors? Refractive errors occur when the shape of the eye prevents light from focusing directly on the retina. The length of the eyeball (longer or shorter), changes in the shape of the cornea, or aging of the lens can cause refractive errors. What is refraction? Refraction is the bending of light as it passes through one object to another. Vision occurs when light rays are bent (refracted) as they pass through the cornea and the lens. The light is then focused on the retina. The retina converts the light-rays into messages that are sent through the optic nerve to the brain. The brain interprets these messages into the images we see. Frequently Asked Questions about Refractive Errors What are the different types of refractive errors

Issues Topics For Authors About Editorial Board Subscriptions June 2009 Volume 50, Issue 6 ‹ Issue › Jump To... http://iovs.arvojournals.org/article.aspx?articleid=2126119 Methods Results Discussion Free Clinical and Epidemiologic Research| June 2009The Impact of Corrected and Uncorrected Refractive Error on Visual Functioning: The Singapore Malay Eye Study Ecosse L. Lamoureux; Seang-Mei Saw; Julian Thumboo; Hwee Lin Wee; Tin Aung; Paul Mitchell; Tien Y. Wong Author Affiliations Ecosse L. Lamoureux From the Centre for Eye Research refractive error Australia, the Royal Victorian Eye and Ear Hospital, University of Melbourne, East Melbourne, Australia;Singapore Eye Research Institute, Singapore National Eye Centre, Singapore; the Seang-Mei Saw Departments of Community, Occupational, and Family Medicine,Ophthalmology, Julian Thumboo Medicine, andDepartment of Rheumatology and Immunology, Singapore General Hospital, Singapore; and the Hwee Lin Wee Pharmacy, Yong Loo Lin School definition of uncorrected of Medicine, National University of Singapore, Singapore; theDepartment of Rheumatology and Immunology, Singapore General Hospital, Singapore; and the Tin Aung Singapore Eye Research Institute, Singapore National Eye Centre, Singapore; theOphthalmology, Paul Mitchell Centres for Vision Research, University of Sydney, Sydney, Australia. Tien Y. Wong From the Centre for Eye Research Australia, the Royal Victorian Eye and Ear Hospital, University of Melbourne, East Melbourne, Australia;Singapore Eye Research Institute, Singapore National Eye Centre, Singapore; theOphthalmology, Investigative Ophthalmology & Visual Science June 2009, Vol.50, 2614-2620. doi:10.1167/iovs.08-2164 Views Full Article Figures Tables PDF Share E-mail Facebook Twitter Google Digg Delicious CiteULike Tumblr StumbleUpon Tools Alerts User Alerts You are adding an alert for: The Impact of Corrected and Uncorrected Refractive Error on Visual Functioning: The Singapore Malay Eye Study You will receive an email whenever this article is corrected, updated, or cited in the literature. You can manage this and all other alerts in My Account The alert will be sent to:

 

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