presbyopia
/ˌprɛzbɪˈəʊpɪə
/noun [mass noun]
Long-sightedness caused by loss of elasticity of the lens of the eye, occurring typically in middle and old age.A number of changes occur in the eye as you grow older, but most experts agree that a hardening of your lens causes presbyopia....
- The theory is that presbyopia occurs because the lens becomes too large, not too hard but too large.
- This is another option for people with presbyopia, in which you use a lens with the reading prescription in one eye and a lens with the distance prescription in the other eye.
Derivatives
presbyopic
- If you had good, uncorrected vision before becoming presbyopic, you may be able to use nonprescription, over-the-counter reading glasses.
- Those who are farsighted and prematurely presbyopic may indeed be candidates for this procedure but not most aviators.
- I spend way too much time online, reading most of my news on a computer where my presbyopic vision is aided by bright contrast and the ability to make fonts larger.
Origin
Late 18th century: modern Latin, from Greek presbus 'old man' + ōps, ōp- 'eye'.