trifocal
1
6.8
- noun
- /ˈtraɪˌfoʊkəl/
- Specialized
:
lente trifocal
- The Trifocal Model (Rimm, 1995b), a six-step program developed at the clinic, is used as part of both clinic and school interventions to reverse underachievement for many gifted children.
- trifocal lens
Examples
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Still, I couldn't help thinking, "This is how you serve a 4-foot-11 woman with white hair, trifocals, and a hesitating gait?"
Blog text (17) -
Thomasina wore trifocals and had been operated on for cataracts.
Fiction book (1992) -
Well, I did not expect his identification of me on account he wears trifocals.
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The trifocal lenses allow people to see clearly at different distances, making them ideal for reading, computer work, and driving.
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Many older adults choose trifocal glasses to improve their vision at all ranges without needing multiple pairs of glasses.
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After trying various options, she found that trifocal lenses provided the best clarity for both reading and distance tasks.
Synonyms
An artificial device put in the eye that helps you see near and far without glasses
How Many Foci
Surface Forms
Morphology
trifocal = trifocal (semi-transparent) = tri + focal
The noun is a zero-derived use of the adjective 'trifocal', and the adjective itself is transparently built from 'tri-' + 'focal'.
Etymology
A trifocal is a lens whose name comes from tri- meaning 'three' and focal from focus meaning 'a point for seeing'. So a trifocal has three sections for near, middle, and far vision, letting you see at all distances without changing glasses.