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"Refractive Errors"
Clinical Trials — Comparative Study of Cycloplegic Refraction and Subjective Refraction With Fogging in School Age Children Device: Balafilcon A Lenses with ReNu Multiplus; Device: Balafilcon A Lenses with Optifree RepleniSH The Collaborative Longitudinal ...More…
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Refractive Errors
Academy of Ophthamology — 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…
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Refractive Errors
Medem — 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…
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Questions and Answers about Refractive Errors
National Eye Institute — 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…
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Presbyopia
Mayo Clinic — Presbyopia - Comprehensive overview covers causes, screening and treatment, including corrective lenses and refractive surgery. Presbyopia - the gradual loss of your eyes' ability to focus actively on nearby objects - is a not-so-subtle reminder ...More…
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Cornea transplant
Mayo Clinic — Cornea transplant - Overview covers what to expect during and after cornea transplant. A cornea transplant is a surgical procedure to replace part of your cornea with corneal tissue from a deceased donor. Your cornea is the transparent, ...More…
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Gafas y lentes de contacto
Kids Health — 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 correctamente y que ...More…
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Eye Care Facts and Myths: A Closer Look
Medem — We all have been told by someone at some time, "You'll hurt your eyes if you do that!" But do you really know what is or is not good for your eyes? Test yourself with the following true or false statements and see how much you know about ...More…
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"Hyperopia"
Clinical Trials — Open Studies / "Hyperopia" Prevalence of Angle Closure in Caucasian Hyperopes Chronic Angle Closure Glaucoma Device: Glasses for the correction of low to moderate farsightedness Enhancement of Emmetropization in Hyperopic Infants Hyperopia; ...More…
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"Astigmatism"
Clinical Trials — Assessment of Visual Performance in Patients With Low Levels of Astigmatism Investigation of Corneal Aberrations and Visual Outcomes in Patients Implanted With an AcrySof Toric Intraocular Lens (IOL) Evaluation of the Bausch & Lomb PureVision ...More…
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Presbyopia
American Optometric Assoc — Presbyopia is a vision condition in which the crystalline lens of your eye loses its flexibility, which makes it difficult for you to focus on close objects. Presbyopia may seem to occur suddenly, but the actual loss of flexibility takes place ...More…