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

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

presbyopic [prez-bee-op-ik, pres-] , adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
presbyopia (ˌprɛzbɪˈəʊpɪə)
a progressively diminishing ability of the eye to focus, noticeable from middle to old age, caused by loss of elasticity of the crystalline lens
[C18: New Latin, from Greek presbus old man + ōps eye]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

presbyopia pres·by·o·pi·a (prěz'bē-ō'pē-ə, prěs'-)
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
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