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hyperopia

[hahy-per-oh-pee-uh] /ˌhaɪ pərˈoʊ pi ə/
noun, Ophthalmology
1.
a condition of the eye in which parallel rays are focused behind the retina, distant objects being seen more distinctly than near ones; farsightedness (opposed to myopia).
Also called hypermetropia
[hahy-per-mi-troh-pee-uh] /ˌhaɪ pər mɪˈtroʊ pi ə/ (Show IPA)
.
Origin
1880-1885
1880-85; hyper- + -opia
Related forms
hyperopic
[hahy-per-op-ik, -oh-pik] /ˌhaɪ pərˈɒp ɪk, -ˈoʊ pɪk/ (Show IPA),
adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for hyperopia
  • People who have hyperopia can see better at a distance than up close.
British Dictionary definitions for hyperopia

hyperopia

/ˌhaɪpəˈrəʊpɪə/
noun
1.
inability to see near objects clearly because the images received by the eye are focused behind the retina; long-sightedness Also called hypermetropia, hypermetropy Compare myopia, presbyopia
Derived Forms
hyperopic (ˌhaɪpəˈrɒpɪk) adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for hyperopia
n.

1884, Modern Latin, from hyper- + Greek ops "eye" (see eye).

Online Etymology Dictionary, © 2010 Douglas Harper
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hyperopia in Medicine

hyperopia hy·per·o·pi·a (hī'pə-rō'pē-ə)
n.

Abbr. H An abnormal condition of the eye in which vision is better for distant objects than for near objects. It results from the eyeball being too short for light rays to properly focus on the retina, thus forming a blurred image. Also called farsightedness, hypermetropia.


hy'per·ope' (hī'pə-rōp') n.
hy'per·o'pic (-ō'pĭk, -ŏp'ĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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hyperopia in Science
hyperopia
  (hī'pə-rō'pē-ə)   

A defect of the eye that causes light to focus behind the retina instead of directly on it, resulting in an inability to see near objects clearly. Hyperopia is often caused by a shortened eyeball or a misshapen lens. Also called farsightedness. Compare myopia.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Article for hyperopia

farsightedness

refractive error or abnormality in which the cornea and lens of the eye focus the image of the visual field at an imaginary point behind the retina (the light-sensitive layer of tissue lining the back and sides of the eye). The retina thus receives an unfocused image of near objects, though distant objects may be in focus. Hyperopia frequently occurs when an eye is shorter than normal from front to rear; the lens is then unable to increase its convexity sufficiently to focus the images of close objects onto the retina. Corrective lenses for hyperopia are designed to supply the additional convexity needed for focusing. Hyperopic laser in situ keratomileusis (H-LASIK) and photorefractive keratectomy for hyperopia (H-PRK) are common surgical methods that reshape the cornea to improve vision in hyperopic patients.

Learn more about farsightedness with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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