TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

VERTEX SPHERE [1 record]

Record 1 2023-05-16

English

Subject field(s)
  • Orthoses
  • Prostheses
  • The Eye
DEF

An imaginary spherical surface touching the back vertex.

OBS

The radius of curvature of the vertex sphere is the same as the steepest back optic zone radius, back central optic radius, or back vertex radius of an aspheric lens.

OBS

Glasses and contact lenses are considered to be either visual orthotic devices or visual prosthetic devices.

OBS

vertex sphere: term and definition standardized by the International Organization for Standardization (ISO).

French

Domaine(s)
  • Orthèses
  • Prothèses
  • Oeil
DEF

Surface sphérique imaginaire touchant le sommet arrière.

OBS

Le rayon de courbure de la sphère du sommet est identique au rayon de la zone optique postérieure, au rayon optique central postérieur ou au rayon de sommet arrière d'une lentille asphérique ayant la plus forte pente.

OBS

Les lunettes et les lentilles de contact sont considérées comme étant soit des orthèses visuelles, soit des prothèses visuelles.

OBS

sphère du sommet : terme et définition normalisés par l'Organisation internationale de normalisation (ISO).

Spanish

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