trifocal


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tri·fo·cal

 (trī-fō′kəl, trī′fō′-)
adj.
1. Having three focal lengths.
2. Having one section that corrects for distant vision, a second section that corrects for medium vision, and a third that corrects for near vision, as an eyeglass lens.
n.
1. A lens having three focal lengths.
2. trifocals Eyeglasses having trifocal lenses.

trifocal

adj
1. (Mathematics) having three focuses
2. (General Physics) having three focal lengths
n
(Medicine) (plural) glasses with trifocal lenses

tri•fo•cal

(traɪˈfoʊ kəl, ˈtraɪˌfoʊ-)

adj.
1. (of a lens) having three foci.
2. (of an eyeglass lens) having three portions, one for near, one for intermediate, and one for far vision.
n.
3. trifocals, eyeglasses with trifocal lenses.
[1945–50]
Translations

tri·fo·cal

a. trifocal;
___ lenseslentes ___ -es.

trifocal

adj trifocal
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References in periodicals archive ?
M2 EQUITYBITES-September 2, 2019-Vision For Life's surgeon to surgically implant the first and only trifocal lens in the US
M2 PHARMA-September 2, 2019-Vision For Life's surgeon to surgically implant the first and only trifocal lens in the US
Global Banking News-September 2, 2019-Vision For Life's surgeon to surgically implant the first and only trifocal lens in the US
M2 PRESSWIRE-August 23, 2019-: Global Glass Lens Market 2019-2024: Focus on Single Vision, Progressive, Bifocal and Trifocal, Photochromic, Polarized, & Polycarbonate Lenses
He said: "Professionally, I specialise in cataract and refractive surgery so undertake mostly cataract surgery often with premium lenses such as trifocal, extended depth of focus or toric lenses.
Trifocal lens technology gives three focal points for distance, intermediate and near and represent the latest presbyopic lens technology.
The principle involves insertion of two nails in medullary cavity via dual entry windows on lateral and medial side7 thus counteracting the trifocal buttressing effect.
According to Moorfields, the trifocal lens implant procedure generally delivers better vision results than LASIK correction for patients over the age of 55, who want total freedom from wearing glasses.
setting the AcrySof IQ PanOptix IOL apart from other trifocal IOLs.
Six months after, the country's trifocal educational institutions - Department of Education (DepEd), Commission on Higher Education (CHED) and Technical Education and Skills Development Authority (TESDA) - are still grappling with the needed implementing rules and regulations (IRR) for the said law.
One of the reforms included in EDCOM I is the present trifocal education system.
For example, if you get a new prescription for glasses, or switch to wearing bifocal or trifocal lenses, it may take time for you to adjust.