presbyopia

(redirected from old sight)
Also found in: Thesaurus, Medical, Legal, Encyclopedia.

pres·by·o·pi·a

 (prĕz′bē-ō′pē-ə, prĕs′-)
n.
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.

presbyopia

(ˌprɛzbɪˈəʊpɪə) or

presbyopy

n
(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

pres•by•o•pi•a

(ˌprɛz biˈoʊ pi ə, ˌprɛs-)

n.
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
Translations

presbyopia

n presbicia, vista cansada (fam)
References in periodicals archive ?
Also, by installing a new front sight while the old sight was still in place, I could use the old sight to help align or position the new sight bead.
Meanwhile, it was a sad old sight this week when Cheryl stepped out of a Scottish hotel looking like she'd rejoined the lollipop head brigade.
There was the old sight of Bryant pointing to where the ball should go and pointing to where his teammates should be.