hypermetropia

hyperopia

[hahy-per-oh-pee-uh]
noun Ophthalmology.
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] .


Origin:
1880–85; hyper- + -opia

hyperopic [hahy-per-op-ik, -oh-pik] , adjective
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Collins
World English Dictionary
hypermetropia or hypermetropy (ˌhaɪpəmɪˈtrəʊpɪə, ˌhaɪpəˈmɛtrəpɪ)
 
n
pathol variants of hyperopia
 
[C19: from Greek hupermetros beyond measure (from hyper- + metron measure) + -opia]
 
hypermetropy or hypermetropy
 
n
 
[C19: from Greek hupermetros beyond measure (from hyper- + metron measure) + -opia]
 
hypermetropic or hypermetropy
 
adj
 
hyperme'tropical or hypermetropy
 
adj

hyperopia (ˌhaɪpəˈrəʊpɪə)
 
n
myopia Compare presbyopia hypermetropia, Also called: hypermetropy inability to see near objects clearly because the images received by the eye are focused behind the retina; long-sightedness
 
hyperopic
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

hypermetropia hy·per·me·tro·pi·a (hī'pər-mĭ-trō'pē-ə)
n.
See hyperopia.

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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American Heritage
Science Dictionary
hyperopia   (hī'pə-rō'pē-ə)  Pronunciation Key 


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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 Britannica
Encyclopedia

hypermetropia

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.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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