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bifocal segment [1 record]

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Alphabetical list of terms

Record 1 1994-01-20

English

Subject field(s)
  • Visual Disorders
  • Optical Glass
DEF

The smaller of the two dioptrically different portions of a bifocal lens.

OBS

Bifocal segments may be referred to as flat top or round top depending on the shape of the upper part of the bifocal segments.

OBS

See entries for round top and flat top in CAEYE.

French

Domaine(s)
  • Troubles de la vision
  • Verres d'optique
OBS

[les verres bifocaux] sont caractérisés par la dimension et la position du segment dans le verre de loin.

OBS

hauteur du segment bifocal : Terme relevé dans ISO, 1986, no 8320, page 5.

Spanish

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