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presbyopia

[prez-bee-oh-pee-uh, pres-]
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noun Ophthalmology.
  1. farsightedness due to ciliary muscle weakness and loss of elasticity in the crystalline lens.
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Origin of presbyopia

1785–95; < Greek presby- (combining form of présbys old, old man) + -opia
Related formspres·by·op·ic [prez-bee-op-ik, pres-] /ˌprɛz biˈɒp ɪk, ˌprɛs-/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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

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
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Derived Formspresbyopic (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

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.

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Online Etymology Dictionary, © 2010 Douglas Harper
presbyopia in Medicine

presbyopia

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