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bifocal

   Also found in: Medical, Encyclopedia, Wikipedia 0.04 sec.
bi·fo·cal  (b-fkl, bf-)
adj.
1. Having two focal lengths.
2. Having one section that corrects for distant vision and another that corrects for near vision, as an eyeglass lens.
3. Embodying two distinct and often conflicting goals, interests, or courses of action: "a smoothly functioning bifocal mind" (John McPhee). "A bifocal monetary policy . . . has kept one eye on the money supply and the other on interest rates" (Edward Meadows).
pl.n. bi·fo·cals (bfklz, b-f-)
Eyeglasses with bifocal lenses.

bi·focal·ism n.

bifocal [baɪˈfəʊkəl]
adj
1. (Physics / General Physics) Optics having two different focuses
2. (Medicine) relating to a compound lens permitting near and distant vision
ThesaurusLegend:  Synonyms Related Words Antonyms
Adj.1.bifocal - having two foci; "bifocal eyeglasses"
optics - the branch of physics that studies the physical properties of light
central - in or near a center or constituting a center; the inner area; "a central position"
Translations
bifocal [ˈbaɪˈfəʊkəl]
A. ADJbifocal
B. N bifocalsgafas fpl bifocales

bifocal
adjBifokal-
n bifocals
plBifokalbrille f

bifocal
adj bifocal [baiˈfəukəl]
(of lenses) having two points of focus, which help people to see things close at hand and things far away. bifokale ثُنائي البُؤْره двуфокусен bifokální bifokal mit zwei Brennpunkten; Bifokal-... διεστιακός (για φακούς όρασης) bifocal bifokaal- دو کانونه؛ دو دیده kaksitehoinen à double foyer מִשקָפַייִם דוּ-מוֹקְדִיים दो फोकस वाला bifokalni bifokális fokus ganda tvískipt gleraugu bifocale 二焦点の 초점이 둘 있는 dviejų židinių bifokāls dwifokus dubbelgeslepen bifokal dwuogniskowy bifocal bifo­cal бифокальный bifokálny dvogoriščen bifokalni bifokal ที่มีสองเลนส์ เลนส์หนึ่งมองใกล้ อีกเลนส์มองไกล iki odaklı, çift mercekli 雙焦點的 двофокусний, біфокальний دوہری عینک hai tròng


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? Mentioned in ? References in periodicals archive
 
New: soft bifocal contact lens, Cabbage Patch Kids.
Inside, however, the book covers twenty-two of his inventions, first by showing their use in today's world (a pedestrian looks down through his bifocals to read a wanted poster and then looks up to identify the criminal across the street) and second by explaining Franklin's role in their development (he designed bifocals to avoid switching between two pair of glasses).
to replace bifocals with electric lenses that can switch quickly from one type of focus to another.
 
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