Bifocal: meaning, definitions and examples

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bifocal

 

[ หˆbaษชหŒfoสŠkษ™l ]

Adjective
Context #1 | Adjective

eyewear types

Bifocal lenses are optical lenses that contain two distinct optical powers. They are primarily used to correct presbyopia, a condition that affects the eye's ability to focus on nearby objects as people age. The top section of the lens is designated for distance vision, while the lower part is for near vision. This dual functionality allows wearers to see clearly at different distances without needing to switch between multiple pairs of glasses.

Synonyms

bi-vision, double vision, two-focus

Examples of usage

  • He bought bifocal glasses for reading and driving.
  • After struggling to see both closely and far away, she decided to get bifocals.
  • The doctor recommended bifocal lenses for his aging vision.

Translations

Translations of the word "bifocal" in other languages:

๐Ÿ‡ต๐Ÿ‡น bifocal

๐Ÿ‡ฎ๐Ÿ‡ณ เคฆเฅเคตเคฟเคฆเฅƒเคทเฅเคŸเคฟ

๐Ÿ‡ฉ๐Ÿ‡ช Bifokal

๐Ÿ‡ฎ๐Ÿ‡ฉ bifokal

๐Ÿ‡บ๐Ÿ‡ฆ ะฑั–ั„ะพะบะฐะปัŒะฝะธะน

๐Ÿ‡ต๐Ÿ‡ฑ bifokalny

๐Ÿ‡ฏ๐Ÿ‡ต ไบŒ้‡็„ฆ็‚นใƒฌใƒณใ‚บ

๐Ÿ‡ซ๐Ÿ‡ท bifocal

๐Ÿ‡ช๐Ÿ‡ธ bifocal

๐Ÿ‡น๐Ÿ‡ท bifokal

๐Ÿ‡ฐ๐Ÿ‡ท ์ด์ค‘ ์ดˆ์ 

๐Ÿ‡ธ๐Ÿ‡ฆ ุซู†ุงุฆูŠ ุงู„ุจุคุฑุฉ

๐Ÿ‡จ๐Ÿ‡ฟ bifokรกlnรญ

๐Ÿ‡ธ๐Ÿ‡ฐ bifokรกlny

๐Ÿ‡จ๐Ÿ‡ณ ๅŒ็„ฆ็‚น

๐Ÿ‡ธ๐Ÿ‡ฎ bifokal

๐Ÿ‡ฎ๐Ÿ‡ธ bifokal

๐Ÿ‡ฐ๐Ÿ‡ฟ ะตะบั– ั„ะพะบัƒัั‚ั‹

๐Ÿ‡ฌ๐Ÿ‡ช แƒ‘แƒ˜แƒคแƒแƒ™แƒแƒšแƒฃแƒ แƒ˜

๐Ÿ‡ฆ๐Ÿ‡ฟ bifokal

๐Ÿ‡ฒ๐Ÿ‡ฝ bifocal

Etymology

The term 'bifocal' is derived from the combination of 'bi-', meaning two, and 'focal', related to focus. The concept of bifocal lenses is attributed to Benjamin Franklin in the 18th century. Franklin is said to have developed the first pair of bifocals by cutting two different lenses in half and combining them into one frame, allowing him to see both far and near without switching glasses. Since then, bifocal lenses have evolved, and modern advancements have led to the creation of progressive lenses that provide a smoother transition between different focal points. The use of bifocals has grown significantly with the aging population, as presbyopia affects nearly everyone after a certain age.

Word Frequency Rank

Ranking #35,571, this word is encountered relatively rarely in everyday English. It might appear in literary works or specialized texts but isn't essential for general communication.