from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Inability of the eye to focus sharply on nearby objects, resulting from loss of elasticity of the crystalline lens with advancing age.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Inability of the eye, due to ageing, to focus on nearby objects; farsightedness
from the GNU version of the Collaborative International Dictionary of English
- 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.
from The Century Dictionary and Cyclopedia
- n. Diminished power of accommodation for near objects, incident to advancing years, and due to progressive loss of elasticity in the crystalline lens.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a reduced ability to focus on near objects caused by loss of elasticity of the crystalline lens after age 45
New Latin : Greek presbus, old man; see per1 in Indo-European roots + -opia.(American Heritage® Dictionary of the English Language, Fourth Edition)
From New Latin, from Ancient Greek πρέσβυς (presbys, "old man"), and New Latin -opia ("vision problem"), from Ancient Greek ὤψ (ōps, "eye"). (Wiktionary)