PRESBYOPIA
presbyopia, farsightedness
(noun) a reduced ability to focus on near objects caused by loss of elasticity of the crystalline lens after age 45
Source: WordNet® 3.1
Etymology
Noun
presbyopia (usually uncountable, plural presbyopias)
Inability of the eye, due to ageing, to focus on nearby objects; farsightedness
Antonyms
• myopia
Source: Wiktionary
Pres`by*o"pi*a Etym: [NL., from Gr. (Med.)
Definition: A defect of vision consequent upon advancing age. It is due to
rigidity of the crystalline lens, which producepresbytia.
Source: Webster’s Unabridged Dictionary 1913 Edition