Questions and Answers about Refractive Errors
Refractive errors include myopia, hyperopia, presbyopia, and astigmatism, eye conditions that are very common. Most people have one or more of them. Refractive errors can usually be corrected with eyeglasses or contact lens. If you have myopia ... [... more]
National Eye Institute |
Photos, Images, and Videos
An eye care professional uses a phoropter to detect refractive errors in a teenage patient. An eye care professional uses a trial frame and lens to determine a patient's eyeglass prescription. A direct ophthalmoscope allows the eye care ... [... more]
National Eye Institute |
Refractive Errors
In order for our eyes to be able to see, light rays must be bent or refracted by the cornea and the lens so they can focus on the retina, the nerve layer that lines the back of the eye. The retina receives the picture formed by these light rays ... [... more]
Medem |
"Myopia"
Efficacy of PEG-400 and Systane Artificial Tears (Alcon) on Quality of Vision Corrected Measurement of the Retinal Nerve Fiber Layer Thickness by Optic Disc Configuration With the Cirrus HD OCT Comparison of Lens Care Regimens With a Silicone ... [... more]
Clinical Trials |
Gafas y lentes de contacto
Nuestros ojos necesitan doblar los rayos de luz para que las imágenes se puedan enfocar nítidamente en la retina. Cuanto mejor se proyecte la imagen en la retina, más probable será que nuestro cerebro interprete la imagen [... more]
Kids Health |
"Refractive Errors"
Randomized Clinical Trial of Bifocal Lenses Versus Computer-Specific Progressive Addition Lenses Comparative Study of Cycloplegic Refraction and Subjective Refraction With Fogging in School Age Children Does Undercorrection of Myopia Retard ... [... more]
Clinical Trials |
Refractive Errors
A refractive error is the most common eye problem. When the shape of the eye is abnormal, the eye doesn't bend (or refract) light properly, and vision is blurred. If your vision blurs when you are looking at objects near or far, you should visit ... [... more]
Academy of Ophthamology |
National Institutes of Health (NIH) - Home Page
Official website of the National Institutes of Health (NIH). NIH is one of the world's foremost medical research centers. An agency of the U.S. Department of Health and Human Services, the NIH is the Federal focal point for health research. The ... [... more]
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On Exhibit at NLM
The National Library of Medicine (NLM), on the campus of NIH in Bethesda, Maryland, is the world's largest medical library. It collects materials in all major areas of the health sciences and to a lesser degree in such areas as chemistry, ... [... more]
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MedlinePlus Health Information from the National Library of Medicine Start here with 750 topics on conditions, diseases and wellness About your prescription and over-the-counter medicines, herbs and supplements A service for finding local ... [... more]
medlineplus.gov |
It's hurricane and tropical storm season. Learn more:
MedlinePlus Health Information from the National Library of Medicine Start here with 750 topics on conditions, diseases and wellness About your prescription and over-the-counter medicines, herbs and supplements A service for finding local ... [... more]
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Find an Eye M.D.
The American Academy of Ophthalmology offers Find an Eye M.D., an on-line listing of member ophthalmologists practicing in the United States and abroad. You are prohibited from downloading, republishing, reselling or duplicating, in whole or in ... [... more]
aao.org |
