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 (prĕz′bē-ō′pē-ə, prĕs′-)
Inability of the eye to focus sharply on nearby objects, resulting from loss of elasticity of the crystalline lens with advancing age.

[New Latin : Greek presbus, old man; see per in Indo-European roots + -opia.]

pres′by·op′ic (-ŏp′ĭk, -ō′pĭk) adj.


(ˌprɛzbɪˈəʊpɪə) or


(Pathology) a progressively diminishing ability of the eye to focus, noticeable from middle to old age, caused by loss of elasticity of the crystalline lens
[C18: New Latin, from Greek presbus old man + ōps eye]
presbyopic adj


(ˌprɛz biˈoʊ pi ə, ˌprɛs-)

farsightedness due to ciliary muscle weakness and loss of elasticity in the crystalline lens, usu. associated with aging.
[1785–95; < Greek presby- (comb. form of présbys old, old man) + -opia]
pres`by•op′ic (-ˈɒp ɪk) adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.presbyopia - a reduced ability to focus on near objects caused by loss of elasticity of the crystalline lens after age 45
hypermetropia, hypermetropy, hyperopia, longsightedness, farsightedness - abnormal condition in which vision for distant objects is better than for near objects


n presbicia, vista cansada (fam)
References in periodicals archive ?
Presbyopia is a visual condition that develops around age 40 when it becomes apparent that reading glasses, commonly referred to as "readers", are needed to focus clearly on nearby objects, such as reading a newspaper.
NOVARTIS HAS confirmed its plans to begin human trials of a 'smart' contact lens for presbyopia next year.
There is a huge interest in the field because presbyopia prevalence is extremely high with the number of presbyopes that in 2005 exceed one billion.
Simple reading glasses with convex lenses are used to correct presbyopia.
assemble 35 chapters by a group of ophthalmologists and optometrists from Europe, North America, Australia, and Brazil who summarize current views on the physiology of accommodation and age-based changes that lead to presbyopia.
Signs that you may be affected by presbyopia include finding it difficult to focus, blurred vision at normal reading distance and eye fatigue along with headaches when carrying out close work.
The researchers were studying presbyopia - the loss of near vision that occurs with age.
The new evidence was found by a team of researchers who performed a meta-analysis using nine cross-sectional studies to compare the prevalence and magnitude of presbyopia, commonly described as the loss of near vision that occurs with age, among men and women.
Presbyopia When you look at a distant object, the lens of the eye focuses the image on to the retina so you can see clearly, and when you look at an object close up - to read for instance - the lens changes shape so the image is still focused.
Intraocular lenses, the next generation of implantable lenses, are designed to correct cataracts and presbyopia, the blurry eyesight that commonly occurs around age 40.
Susan Bowers, of Susan Bowers Opticians, in Tile Hill Lane, said people with presbyopia often wrongly assume that if they rest their eyes the problem will go away.
But they also correct presbyopia, the declining ability to see things up close.