hyperopia

hyperopia
—hyperopic /huy'peuhr op"ik, -oh"pik/, adj.
/huy'peuhr oh"pee euh/, n. Ophthalm.
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 /huy'peuhr mi troh"pee euh/.
[1880-85; HYPER- + -OPIA]

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▪ visual disorder
also called  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.

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Universalium. 2010.

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Look at other dictionaries:

  • Hyperopia — Hy per*o pi*a (h[imac] p[ e]r*[=o] p[i^]*[.a]), n. [NL., fr. Gr. ype r over + w ps, wpo s, the eye.] An abnormal condition of the eye in which, through shortness of the eyeball or fault of the refractive media, the rays of light come to a focus… …   The Collaborative International Dictionary of English

  • hyperopia — 1884, Mod.L., from HYPER (Cf. hyper ) + Gk. ops eye (see EYE (Cf. eye)) …   Etymology dictionary

  • hyperopia — [hī΄pər ō′pē ə] n. [ HYPER + OPIA] abnormal vision in which the rays of light are focused behind the retina, so that distant objects are seen more clearly than near ones; farsightedness hyperopic [hī΄pəräp′ik] adj …   English World dictionary

  • Hyperopia — Hypermetropia Classification and external resources ICD 10 H52.0 ICD 9 367.0 Hyperopia, also known as farsig …   Wikipedia

  • hyperopia — Hypermetropia Hy per*me*tro pi*a, Hypermetropy Hy per*met ro*py, n. [NL. hypermetropia, fr. Gr. ? excessive + ?, ?, the eye. See {Hypermeter}.] An abnormal condition of the eye in which, through shortness of the eyeball or fault of the refractive …   The Collaborative International Dictionary of English

  • Hyperopia — Farsightedness; the ability to see distant objects more clearly than close objects. Hyperopia may be corrected with glasses or contact lenses. * * * Longsightedness; that optical condition in which only convergent rays can be brought to focus on… …   Medical dictionary

  • hyperopia — Ametropia Am e*tro pi*a, n. [Gr. ? irregular + ?, ?, eye.] (Med.) a visual impairment resulting from faulty refraction of light rays in the eye. Subtypes include {myopia} {astigmatism} and {hyperopia}. {Am e*trop ic}, a. [1913 Webster +PJC] …   The Collaborative International Dictionary of English

  • hyperopia — noun Etymology: New Latin Date: 1884 a condition in which visual images come to a focus behind the retina of the eye and vision is better for distant than for near objects called also farsightedness • hyperopic adjective …   New Collegiate Dictionary

  • hyperopia — noun A disorder of the vision where the eye focusses images behind the retina instead of on it, so that distant objects can be seen better than near objects. Syn: farsightedness, hypermetropia, hypermetropy …   Wiktionary

  • hyperopia — n. far sightedness, ability to see distant objects more clearly than near ones …   English contemporary dictionary

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