亚洲网紅露点

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View synonyms for

trifocal

[ trahy-foh-kuhl, trahy-foh- ]

adjective

  1. Optics. having three foci.
  2. (of an eyeglass lens) having three portions, one for near, one for intermediate, and one for far vision.


noun

  1. trifocals, eyeglasses with trifocal lenses.

trifocal

adjective

  1. having three focuses
  2. having three focal lengths
鈥淐ollins English Dictionary 鈥 Complete & Unabridged鈥 2012 Digital Edition 漏 William Collins Sons & Co. Ltd. 1979, 1986 漏 HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

noun

  1. plural glasses with trifocal lenses
鈥淐ollins English Dictionary 鈥 Complete & Unabridged鈥 2012 Digital Edition 漏 William Collins Sons & Co. Ltd. 1979, 1986 漏 HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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亚洲网紅露点 History and Origins

Origin of trifocal1

First recorded in 1945鈥50; tri- + focal
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Example Sentences

Examples have not been reviewed.

However, the shooting happened at night, and one witness had poor vision and wore trifocal lenses.

From

Flores鈥 girlfriend, who wore glasses with trifocal lenses, picked out Palacios.

From

I'm really happy about it primarily because I got my cataracts at the best time in America to have cataracts because I got to get the PanOptix Trifocal Lens.

From

Americans would do well to view anti-Semitism with a trifocal lens.

From

The least expensive prescription option is bifocal or trifocal glasses with a visible line separating the top portion of the lens, which corrects for distance if necessary, from the bottom portion, which corrects for presbyopia.

From

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