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The Government of Canada’s terminology and linguistic data bank.
TRIFOCAL LENS [3 records]
Record 1 - internal organization data 2002-04-23
Record 1, English
Record 1, Subject field(s)
- Optical Glass
Record 1, Main entry term, English
- multifocal lens
1, record 1, English, multifocal%20lens
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
A lens with more than one optical center(i. e., a bifocal with two, a trifocal with three, a progressive with many). 2, record 1, English, - multifocal%20lens
Record number: 1, Textual support number: 1 CONT
A multifocal lens is a lens that contains two or more different powers or corrections. The most common multifocal lenses are bifocals (two powers) and trifocals (three powers). Quadrafocals, which are four different powers in one lens, are prescribed for special purposes. Another type of multifocal lens, the progressive additional lens, is designed to provide clear vision from far to reading distance without break or interruption. They contain no dividing lines between the different viewing sections. 3, record 1, English, - multifocal%20lens
Record 1, French
Record 1, Domaine(s)
- Verres d'optique
Record 1, Main entry term, French
- verre multifocal
1, record 1, French, verre%20multifocal
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
Un verre multifocal est un verre correcteur supportant plusieurs puissances. Il permet de corriger en même temps la vision de près et la vision de loin. Ce type de verre est destiné aux presbytes. Il existe des verres bifocaux et des verres trifocaux. 2, record 1, French, - verre%20multifocal
Record number: 1, Textual support number: 1 OBS
Un verre progressif [...] contrairement à un verre multifocal [...] ne présente pas de saut d'image lors du passage entre différentes zones de vision. 3, record 1, French, - verre%20multifocal
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 2000-07-11
Record 2, English
Record 2, Subject field(s)
- Orthoses
- The Eye
Record 2, Main entry term, English
- add power 1, record 2, English, add%20power
Record 2, Abbreviations, English
Record 2, Synonyms, English
Record 2, Textual support, English
Record number: 2, Textual support number: 1 OBS
addition : The difference in spherical power between the distance and the near corrections in a bifocal or trifocal lens; usually referred to as the "add". 2, record 2, English, - add%20power
Record 2, French
Record 2, Domaine(s)
- Orthèses
- Oeil
Record 2, Main entry term, French
- puissance d'addition
1, record 2, French, puissance%20d%27addition
correct, feminine noun
Record 2, Abbreviations, French
Record 2, Synonyms, French
Record 2, Textual support, French
Record 2, Spanish
Record 2, Textual support, Spanish
Record 3 - internal organization data 2000-07-11
Record 3, English
Record 3, Subject field(s)
- Orthoses
- The Eye
Record 3, Main entry term, English
- addition
1, record 3, English, addition
correct
Record 3, Abbreviations, English
Record 3, Synonyms, English
- add 1, record 3, English, add
correct
Record 3, Textual support, English
Record number: 3, Textual support number: 1 DEF
The difference in spherical power between the distance and the near corrections in a bifocal or trifocal lens. 2, record 3, English, - addition
Record 3, French
Record 3, Domaine(s)
- Orthèses
- Oeil
Record 3, Main entry term, French
- addition
1, record 3, French, addition
correct, feminine noun
Record 3, Abbreviations, French
Record 3, Synonyms, French
Record 3, Textual support, French
Record number: 3, Textual support number: 1 CONT
La partie centrale de la face postérieure est plus cambrée que la périphérie, ce qui crée l'addition. 1, record 3, French, - addition
Record 3, Spanish
Record 3, Textual support, Spanish
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