bifocals
bifocals — noun
1. a pair of spectacles whose lenses combine two different strengths — the upper se
a pair of spectacles whose lenses combine two different strengths — the upper section helps you see distant objects clearly, and the lower section helps you read or see things up close.
Ayana got her first pair of bifocals last year and can now drive and read without switching glasses.
pair of bifocals
The optician adjusted Takeshi's bifocals so the line between the two lenses sat at eye level.
adjusted bifocals
Marta wears bifocals at work to see her screen and read documents without switching glasses.
After turning fifty, Theo's eye doctor recommended bifocals to help with both distance and close-up reading.
- progressive lenses
a modern type of bifocal without the visible dividing line across the lens
- reading glasses
correct only near vision; not the same as bifocals which also correct distance vision
- single-vision glasses
lenses with just one strength for the whole lens
用法筆記
Bifocals is a plural noun and takes a plural verb (e.g., 'These bifocals are comfortable'). To refer to one item, use 'a pair of bifocals.'
常見錯誤
bifocals — adjective
- bifocalspositive
- more bifocalscomparative
- most bifocalssuperlative
1. describes a lens or a pair of glasses that contains two optical strengths — one
describes a lens or a pair of glasses that contains two optical strengths — one for seeing objects at a distance and another for close-up tasks such as reading.
Rodrigo ordered bifocal contact lenses that correct his vision for both the cinema screen and the book in his hands.
bifocal contact lenses
Sade's bifocal glasses let her read the dashboard while driving to work.
bifocal glasses + named referent showing dual use
Reema chose progressive lenses over traditional bifocal ones because they do not have a visible line across the surface.
Sirin bought bifocal sunglasses for long days of hiking in the mountains.
- dual-focus
a less common synonym that carries the same meaning
- multifocal
a broader term that includes lenses with more than two optical strengths
- single-vision
describes a lens with only one strength across the entire surface
用法筆記
Typically used before a noun as an attributive adjective (e.g., bifocal lenses, bifocal glasses). The adjective form describes the lens technology rather than the eyewear itself.