TERMIUM Plus®

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

Snellen fraction [1 record]

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Record 1 2017-05-09

English

Subject field(s)
  • Diagnostic Procedures (Medicine)
  • The Eye
CONT

Visual acuity is the measure of the sensitivity of the visual system. It is expressed in Snellen notation, expressed as a fraction, where the numerator indicates the test distance and the denominator denotes the distance at which the letter read by the patient subtends 5 minutes of arc.

French

Domaine(s)
  • Méthodes diagnostiques (Médecine)
  • Oeil
DEF

Représentation de l'acuité visuelle sous la forme d'une fraction [...] dans laquelle le numérateur est la distance, exprimée en mètres (ou en pieds), à laquelle on fait l'examen [...], et le dénominateur la distance à laquelle la plus petite lettre de Snellen reconnue par l'œil est vue sous un angle de 5 minutes.

Spanish

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