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presbyopia

[prez-bee-oh-pee-uh, pres-] /ˌprɛz biˈoʊ pi ə, ˌprɛs-/
noun, Ophthalmology
1.
farsightedness due to ciliary muscle weakness and loss of elasticity in the crystalline lens.
Origin of presbyopia
1785-1795
1785-95; < Greek presby- (combining form of présbys old, old man) + -opia
Related forms
presbyopic
[prez-bee-op-ik, pres-] /ˌprɛz biˈɒp ɪk, ˌprɛs-/ (Show IPA),
adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for presbyopia
Historical Examples
  • Still another defect of vision is known as presbyopia or farsightedness due to old age.

    The Science of Human Nature William Henry Pyle
  • "Old sight," known as presbyopia, is a common defect of vision in advancing years.

    A Practical Physiology Albert F. Blaisdell
British Dictionary definitions for presbyopia

presbyopia

/ˌprɛzbɪˈəʊpɪə/
noun
1.
a progressively diminishing ability of the eye to focus, noticeable from middle to old age, caused by loss of elasticity of the crystalline lens
Derived Forms
presbyopic (ˌprɛzbɪˈɒpɪk) adjective
Word Origin
C18: New Latin, from Greek presbus old man + ōps eye
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for presbyopia
n.

"far-sightedness brought on by age," 1791, medical Latin, from Greek presbys "old man" (see presby-) + -opia, from ops "eye" (see eye (n.)). Related: Presbyopic.

Online Etymology Dictionary, © 2010 Douglas Harper
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presbyopia in Medicine

presbyopia pres·by·o·pi·a (prěz'bē-ō'pē-ə, prěs'-)
n.
Inability of the eye to focus sharply on nearby objects, resulting from loss of elasticity of the crystalline lens with advancing age.


pres'by·op'ic (-ŏp'ĭk, -ō'pĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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