‖ety>[ NL., from Gr. &unr_; old, n., an old man + &unr_;, &unr_;, the eye. ] (Med.) 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. [ 1913 Webster ]
Result from Foreign Dictionaries (2 entries found)
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Presbyopia \Pres`by*o"pi*a\[NL., from Gr. ? old, n., an old man
+ ?, ?, the eye.] (Med.)
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}.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
presbyopia
n 1: a reduced ability to focus on near objects caused by loss
of elasticity of the crystalline lens after age 45 [syn:
{presbyopia}, {farsightedness}]
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