Disease or Syndrome
myopia
my·o·pi·a [ mahy-oh-pee-uh ]
Subclass of:
Refractive Errors
Etymology:
Greek myopia = near-sightedness
Ancient Greek word, formed from myein = to shut or wink, and opsis = vision (or ops = eye). Descriptive of the muscular efforts of a near-sighted person to focus on a distant object.
Ancient Greek word, formed from myein = to shut or wink, and opsis = vision (or ops = eye). Descriptive of the muscular efforts of a near-sighted person to focus on a distant object.
Definitions related to myopia:
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A refractive error in which rays of light entering the eye parallel to the optic axis are brought to a focus in front of the retina, as a result of the eyeball being too long from front to back; also called nearsightedness because the near point is less distant than it is in emmetropia with an equal amplitude of accommodation.CRISP ThesaurusNational Institutes of Health, 2006
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An abnormality of refraction characterized by the ability to see objects nearby clearly, while objects in the distance appear blurry.Human Phenotype Ontology (HPO)The Human Phenotype Ontology Project, 2021
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Nearsightedness, also known as myopia, is an eye condition that causes blurry distance vision. People who are nearsighted have more trouble seeing things that are far away (such as when driving) than things that are close up (such as when reading or using a computer). If it is not treated with corrective lenses or surgery, nearsightedness can lead to squinting, eyestrain, headaches, and significant visual impairment. Nearsightedness usually begins in childhood or adolescence. It tends to worsen with age until adulthood, when it may stop getting worse (stabilize). In some people, nearsightedness improves in later adulthood. For normal vision, light passes through the clear cornea at the front of the eye and is focused by the lens onto the surface of the retina, which is the lining of the back of the eye that contains light-sensing cells. People who are nearsighted typically have eyeballs that are too long from front to back. As a result, light entering the eye is focused too far forward, in front of the retina instead of on its surface. It is this change that causes distant objects to appear blurry. The longer the eyeball is, the farther forward light rays will be focused and the more severely nearsighted a person will be. Nearsightedness is measured by how powerful a lens must be to correct it. The standard unit of lens power is called a diopter. Negative (minus) powered lenses are used to correct nearsightedness. The more severe a person's nearsightedness, the...MedlinePlus GeneticsU.S. National Library of Medicine, 2021
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Nearsightedness. An optical error in which light rays meet and focus before reaching the retina, making objects that are far away appear blurry.Harvard Dictionary of Health TermsHarvard Medical Publishing, 2011
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The condition in which the individual does not see far distances clearly.NCI ThesaurusU.S. National Cancer Institute, 2021
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Nearsightedness (myopia) is a common vision condition in which you can see objects near to you clearly, but objects farther away are blurry. It occurs when the shape of your eye causes light rays to bend (refract) incorrectly, focusing images in front of your retina instead of on your retina.Mayo Foundation for Medical Education and Research
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Myopia, visual abnormality in which the resting eye focuses the image of a distant object at a point in front of the retina (the light-sensitive layer of tissue that lines the back and sides of the eye), resulting in a blurred image. Myopic eyes, which are usually longer than normal from front to...Encyclopedia Britannica, Inc., 2020
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