Meaning of PRESBYOPIA
| Pronunciation: | | `prezbi'owpeeu
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 WordNet Dictionary |
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| | Definition: | | [n] farsightedness resulting from a reduced ability to focus caused by loss of elasticity of the crystalline lens with age |
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| | See Also: | | farsightedness, hypermetropia, hypermetropy, hyperopia, longsightedness | |
| Webster's 1913 Dictionary |
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| | Definition: | | \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}.
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| Biology Dictionary |
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| | Definition: | | This is a form of vision impairment in which distant objects are seen more clearly than closer objects. It is a problem of the accommodation of the eye's lens (the eye is less able to flex to focus) and is often associated with old age. |
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