Error Of Refraction Uncorrected
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• Member Center • Lions 100 • Club Locator • refractive error correction LCISTORE MyLCI • LCIF • LCICON • Donate • refractive error ppt Search Search • Close [x] English Deutsch Español Français Italiano Português Suomi Svenska 日本語 한국어 refractive error in children 中文 About LCIF LCIF Mission History General FAQ Accolades Meet the Leaders Board of Trustees LCIF Executive Committee SightFirst Advisory Committee Lions Quest http://www.lcif.org/EN/our-work/sight/uncorrected-refractive-error.php Advisory Committee Multiple District Coordinators Fiscal Responsibility Affiliations Collaborative Partners Contact LCIF LCIF Programs Youth Lions Quest Achievements Sight Partnership Initiatives Childhood Blindness Childhood Blindness Project Opening Eyes Pediatric Cataract Initiative Sight for Kids SightFirst China Action SightFirst FAQ SightFirst Materials Fighting Eye Diseases Cataract Diabetic Retinopathy http://www.lcif.org/EN/our-work/sight/uncorrected-refractive-error.php River Blindness Uncorrected Refractive Error Trachoma Low Vision Education and Rehabilitation Research Eye Health Education Disaster Relief Disaster Work Testimonials How to Donate Donations Japan Relief New Zealand Relief Philippines Typhoon Relief Typhoon Donor Recognition LCIF Providing Tornado Relief Humanitarian Efforts Hearing Hearing FAQ Measles Lions Work Measles - What Is It? Measles Materials Partners Measles News Measles Testimonies Ways to Give Areas of Giving Contributing Member Planned Giving Options Melvin Jones Fellowship Donors Recognition Programs Submit MJF Request Humanitarian Partners FAQ Other Recognition Programs Other Ways to Give Donate Now News and Media LCIF Newsletter Press Releases Share a Story News and Media Resources Publications Exhibits and Banners Forms Sample Press Releases Videos Coordinator Center Calendar Club Visits Forms and Materials Reports Fundraising News PowerPoints LCIF Logos Grants Recent Grants Core 4 Diabetes FAQ SightFirst International Assistance Humanitarian A
to the NEI Health Information Eye Health Topics Clinical Studies Publications Catalog Photos and Images https://nei.nih.gov/health/errors/errors Spanish Language Information News and Events All News Meetings and Events Grants http://www.w-e-h.org/uncorrected-refractive-error.html and Funding All Grants and Funding Division of Extramural Activities Division of Extramural Science Programs Funding Opportunity Announcements Funding Mechanisms Supported by the 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 refractive error Education Program Diabetic Eye Disease Education Program 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 error of refraction at NEI Education Programs Training and Jobs Home > 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 bra
that results in light not being focused clearly on the retina. If an image comes into focus in front of the retina, this is called myopia, and the person is nearsighted – able to see more clearly at near distance than at far distance. If the image comes into focus behind the retina, a condition called hyperopia, then the person is farsighted and able to see better at far distance than at near distance. Other types of refractive errors include astigmatism and presbyopia. Astigmatism represents "uneven" focusing in different planes of the eye. Presbyopia refers to the difficulty focusing up close and occurs with aging, resulting in the need for reading glasses in many people over the age of 40. The cause of refractive errors is unknown. What harm do refractive errors cause? To permit clear vision, myopia, hyperopia, and astigmatism must be corrected, usually with eyeglasses. Uncorrected refractive error can result in visual impairment ranging from mild blurring to legal blindness, depending on the magnitude of the refractive error. If the refractive error of the two eyes is very different and this is not corrected in childhood, then permanent loss of vision, called amblyopia, can result. It has been estimated that more than a half of vision impairment, and about a quarter of legal blindness, is due to refractive error correctable with glasses. The number of people with poor vision due to uncorrected (or undercorrected) refractive error increases greatly in older age groups. In Australia this affects more than a third of the elderly folks who undergo an aged-care assessment. Particularly in older people, poor eyesight can lead to accidents, social withdrawal, and loss of independence. If you notice a change in your vision, contact an eye care professional for an eye exam. Causes of Vision Loss Age Related Macular Degeneration (AMD)Autoimmune DiseasesCataractDiabetic RetinopathyDry Eye DiseaseGlaucomaTrachoma and Other Infectious DiseasesUncorrected Refractive Error Copyright 2014 Women's Eye Health.org Scroll to Top