presbyopia

[ prez-bee-oh-pee-uh, pres- ]
/ ˌprɛz biˈoʊ pi ə, ˌprɛs- /

noun Ophthalmology.

farsightedness due to ciliary muscle weakness and loss of elasticity in the crystalline lens.

Origin of presbyopia

1785–95; < Greek presby- (combining form of présbys old, old man) + -opia

Related forms

pres·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. 2019

Examples from the Web for presbyopia

  • 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

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 for presbyopia

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

Medicine definitions for presbyopia

presbyopia

[ prĕz′bē-ōpē-ə ]

n.

Inability of the eye to focus sharply on nearby objects, resulting from loss of elasticity of the crystalline lens with advancing age.

Related forms

pres′by•opic (-ŏpĭk, -ōpĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.