presbyopia

[n] - farsightedness resulting from a reduced ability to focus caused by loss of elasticity of the crystalline lens with age
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Presbyopia

the loss of focusing flexibility of the eye with age making it more difficult to focus close to.
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Presbyopia

the loss of the ability to focus the eyes on near objects that occurs naturally with age, as a result of loss of elasticity of the lens of the eyes
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Presbyopia

The gradual loss of the eye's ability to change focus from distance to near; occurs in almost everyone sometime after age 40
Found on http://www.dwp.gov.uk/medical/med_conditions/glossary.html

Presbyopia

Our Presbyopia Main Article provides a comprehensive look at the who, what, when and how of Presbyopia Presbyopia: The loss of the eye's ability to change focus to see near objects. The reasons for this loss of the power of accommodation are not yet fully known. It is conventionally said to be due to the lens becoming less elastic with time. Presby...
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Presbyopia

Pres`by·o'pi·a [ New Latin , from Greek ... old, noun , an old man + ..., ..., the eye.] (Medicine) A defect of vision consequent upon advancing age. It is due to rigidity of the crystalline lens, which produces difficulty of accommodation and recession of the near point of vision, so that objects very near the eye...
Found on http://www.encyclo.co.uk/webster/P/154

presbyopia

<ophthalmology> A defect of vision consequent upon advancing age. ... It is due to rigidity of the crystalline lens, which produce difficulty of accommodation and recession of the near point of vision, so that objects very near the eyes can not be seen distinctly without the use of convex glasses. Called also presbytia. ... Source: Websters D...
Found on http://www.encyclo.co.uk/local/20973

presbyopia

noun farsightedness resulting from a reduced ability to focus caused by loss of elasticity of the crystalline lens with age
Found on https://www.encyclo.co.uk/local/20974

presbyopia

(pres″be-o´pe-ә) lessening of accommodation of the lens of the eye, a process that happens normally with aging and usually results in farsightedness (hyperopia). It is caused by a loss of elasticity in the crystalline lens, which focuses images on the retina with the aid of muscles that stretch it to make it less ...
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Presbyopia

• A defect of vision consequent upon advancing age. It is due to rigidity of the crystalline lens, which produces difficulty of accommodation and recession of the near point of vision, so that objects very near the eyes can not be seen distinctly without the use of convex glasses. Called also presbytia.
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presbyopia

loss of ability to focus the eye sharply on near objects as a result of the decreasing elasticity of the lens of the eye. The eye`s ability to focus ... [3 related articles]
Found on http://www.britannica.com/eb/a-z/p/109

presbyopia

presbyopia, presbyopic; presbytia, presbytic, presbytism 1. A form of farsightedness occurring after middle age, caused by a diminished elasticity of the crystalline lens. 2. The physiological loss of accommodation in the eyes in advancing age, said to begin when the near point has receded beyond 22 cm (9 inches). 3. The loss of the eye's ability ...
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presbyopia

A loss of accommodation that normally develops in human eyes over the age of 45 to 50 years. Vision of distant objects remains unchanged but as the eye lens gets older it loses some of its ability to change curvature to focus on near objects. Presbyopia is easily corrected by spectacles or contact l...
Found on http://www.daviddarling.info/encyclopedia/P/presbyopia.html

presbyopia

(Pr) Type: Term Pronunciation: prez′bē-ō′pē-ă Definitions: 1. The physiologic loss of accommodation in the eyes in advancing age, said to begin when the near point has receded beyond 22 cm (9 inches).
Found on http://www.medilexicon.com/medicaldictionary.php?t=71918

presbyopia

Vision defect, an increasing inability with advancing age to focus on near objects. It is caused by thickening and loss of elasticity in the lens, which is no longer able to relax to the near-spherical shape required for near vision
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Presbyopia

With age, we all lose our ability to focus on nearby objects (accommodation). In our eyes, the crystalline lens loses flexibility and our ciliary muscles weaken. This limits our minimum focusing distance. Presbyopes with 6/6 vision need reading glasses; presbyopic myopes and hyperopes need bifocals. Contact lens users can choose between monovision,...
Found on http://www.encyclo.co.uk/local/21361

presbyopia

Condition of the eye where the accommodative ability of the eye has declined to a point where reading spectacles are required.
Found on http://eyediologyopticians.co.uk/pages/Eye-terms-explained.html

Presbyopia

Presbyopia is a condition where, with age, the eye exhibits a progressively diminished ability to focus on near objects. Presbyopia’s exact mechanisms are not known with certainty; the research evidence most strongly supports a loss of elasticity of the crystalline lens, although changes in the lens’ curvature from continual growth and loss of...
Found on http://en.wikipedia.org/wiki/Presbyopia

presbyopia

(prez-bee-OH-pee-uh) Refractive condition in which there is a diminished power of accommodation arising from loss of elasticity of the crystalline lens, as occurs with aging Usually becomes significant after age 45
Found on http://www.eyeglossary.net/
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