TERMIUM Plus®

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

EYE FOCUS [22 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2018-10-18

English

Subject field(s)
  • The Eye
CONT

Spherical errors occur when the optical power of the eye is either too large or too small to focus light on the retina.

CONT

A spectacle prescription may include a spherical component (often called the spherical error or the sphere), a cylindrical component (often called the cylindrical error), a prismatic component, an addition for near vision and the interpupillary distance.

French

Domaine(s)
  • Oeil

Spanish

Save record 1

Record 2 2017-06-07

English

Subject field(s)
  • Visual Disorders
DEF

Discrepancy between the size and refractive powers of the eye, such that images are not brought to a proper focus on the retina; consequently hypermetropia, myopia, or astigmatism are produced.

French

Domaine(s)
  • Troubles de la vision
DEF

Anomalie de la réfraction de l'œil telle qu'en l'absence d'une stimulation de l'accommodation l'image d'un objet situé à l'infini ne se forme pas sur la rétine; il est alors vu flou.

OBS

Les amétropies sont : l'astigmatisme, l'hypermétropie et la myopie.

Spanish

Campo(s) temático(s)
  • Trastornos de la visión
DEF

Defecto de refracción en el que la imagen procedente del infinito no se enfoca en la retina cuando el ojo está en reposo.

Save record 2

Record 3 2017-05-12

English

Subject field(s)
  • The Eye
DEF

The amount in dioptres by which each eye, separately, is able to change its focus.

French

Domaine(s)
  • Oeil
DEF

Nombre total de dioptries correspondant, dans chaque œil, à la distance entre punctum proximum et punctum remotum.

Spanish

Campo(s) temático(s)
  • Ojo
Save record 3

Record 4 2017-05-11

English

Subject field(s)
  • Visual Disorders
DEF

The refractive condition of the eye represented by the location of the conjugate focus of the retina at some finite point in front of the eye, when accommodation is said to be relaxed...

Key term(s)
  • near-sightedness

French

Domaine(s)
  • Troubles de la vision
DEF

Réfraction de l'œil dans laquelle les images d'objets éloignés sont focalisées en avant de la rétine quand l'accommodation est relâchée.

Spanish

Campo(s) temático(s)
  • Trastornos de la visión
DEF

Error de refracción en el que los rayos precedentes del infinito convergen en un punto anterior al plano de la retina cuando el ojo se halla en situación de reposo.

Save record 4

Record 5 2017-05-11

English

Subject field(s)
  • The Eye
CONT

Viewing Distance at Computer Workstations.... Accommodation is when the lens capsule in your eye changes shape to focus on a close object. The eyes have a default accommodation distance, called the resting point of accommodation(RPA). That is the distance at which the eyes focus when there is nothing to focus on. In total darkness our eyes are set to focus at a particular distance, so that if the lights were turned on, an object at that distance would be in clear focus. The RPA averages 30 inches for younger people and gets farther away with age.

CONT

... reading from a computer screen ... Our eyes have what is called a "dark focus." This is the point in space where your focus would be if your eyes were totally relaxed. Imagine a pitch black room. In such an environment, where you can’t see anything, your eyes are actually focusing on a fixed point in space, that is why it is called the "dark" focus. This focus is known as the Resting Point of Accommodation (RPA) and is unique to every individual, but it usually rests more than three feet away from your face (and does not depend on time of day or age).

Key term(s)
  • accommodation resting point
  • accommodation resting state

French

Domaine(s)
  • Oeil
DEF

État passif de l'accommodation de l'œil en absence de stimulation (lorsqu'un sujet est plongé dans l'obscurité ou lorsqu'il fixe un espace lumineux vide).

OBS

L'accommodation, de la position de repos au punctum proximum, serait la réponse à la stimulation du système parasympathique; l'accommodation de la position de repos au punctum remotum serait la réponse à la stimulation du système sympathique.

Spanish

Save record 5

Record 6 2017-05-11

English

Subject field(s)
  • The Eye
CONT

Viewing Distance at Computer Workstations.... Accommodation is when the lens capsule in your eye changes shape to focus on a close object. The eyes have a default accommodation distance, called the resting point of accommodation(RPA). That is the distance at which the eyes focus when there is nothing to focus on. In total darkness our eyes are set to focus at a particular distance, so that if the lights were turned on, an object at that distance would be in clear focus. The RPA averages 30 inches for younger people and gets farther away with age.

CONT

The Century Series of simulators include a comfortable eye accommodation distance of six and one-half feet.

French

Domaine(s)
  • Oeil
CONT

[...] dispositifs à laser [...] Pour les besoins de la présente norme, la plus courte distance d'accommodation de l'œil humain a été fixée à 100 mm pour toutes les longueurs d'onde comprises entre 400 nm et 1 400 nm. Cette valeur a été choisie comme compromis car, à l'exception des personnes jeunes et de quelques myopes, tout le monde ne peut pas accommoder son œil à des distances inférieures à 100 mm.

CONT

Distance écran/spectateur. [...] Si les sièges ou les bancs sont disposés à volonté devant un écran, bien souvent les règles sur l'aire idéale d'observation se trouvent modifiées : spontanément, les spectateurs se disposent en arc de cercle, sensiblement plus en largeur qu'en profondeur. Les moins bien placés acceptent mieux la déformation géométrique qu'une distance d'accommodation non optimale, à condition que l'écran soit peu directif pour ne pas conduire à une perte importante de luminosité.

Spanish

Save record 6

Record 7 2017-04-28

English

Subject field(s)
  • The Eye
DEF

Position closest to the eye where small print can be kept in sharp focus.

French

Domaine(s)
  • Oeil
DEF

[...] point le plus proche que l'œil puisse voir nettement en accommodant au maximum.

Spanish

Save record 7

Record 8 2017-04-28

English

Subject field(s)
  • Optics
  • Land Forces
CONT

The performance of binoculars is quantified by terms such as level of magnification, objective lens diameter, twilight performance factor, exit pupil diameter, transmission, resolving power and field of view. The list of "niceties" includes dioptric adjustment range, individual ocular adjustment, eye relief and individual focus.

French

Domaine(s)
  • Optique
  • Forces terrestres
CONT

D'autres sont des «plus»: amplitude de réglage dioptrique, oculaires réglables individuellement, dégagement de l'œil et mise au point séparée pour chaque œil.

Spanish

Save record 8

Record 9 2017-04-27

English

Subject field(s)
  • Optics
  • Land Forces
CONT

The performance of binoculars is quantified by terms such as level of magnification, objective lens diameter, twilight performance factor, exit pupil diameter, transmission, resolving power and field of view. The list of "niceties" includes dioptric adjustment range, individual ocular adjustment, eye relief and individual focus.

French

Domaine(s)
  • Optique
  • Forces terrestres
CONT

D'autres sont des «plus»: amplitude de réglage dioptrique, oculaires réglables individuellement, dégagement de l'œil et mise au point séparée pour chaque œil.

Spanish

Save record 9

Record 10 2014-04-29

English

Subject field(s)
  • Optical Instruments
  • Surveillance, Detection and Reconnaissance (Military)
CONT

An educational program is not necessarily limited to classroom lectures but may also include use of an eye lane — in which a pilot stands at one side of a dark room and looks through NVGs at an eye chart on the opposite wall to learn to focus the goggles; a terrain board — a miniature layout of the type of terrain where the pilot will operate; or a simulator, as well as computer-based or Web-based training.

French

Domaine(s)
  • Instruments d'optique
  • Surveillance, détection et reconnaissance (Militaire)

Spanish

Save record 10

Record 11 2012-11-06

English

Subject field(s)
  • Visual Disorders
DEF

An error of refraction in the eye so that rays of light in different meridians cannot be brought to a focus together on the retina.

French

Domaine(s)
  • Troubles de la vision
DEF

Réfraction telle que l'image d'un point objet n'est pas un point simple mais est constituée de deux droites focales.

Spanish

Campo(s) temático(s)
  • Trastornos de la visión
DEF

Defecto refractivo que hace que todo se vea deformado o desenfocado, tanto en visión cercana como en visión lejana.

Save record 11

Record 12 2012-05-28

English

Subject field(s)
  • Visual Disorders
DEF

The condition of the eye where incoming rays of light reach the retina before they converge into a focused image.

CONT

Hyperopia, farsightedness, or an inability of the eye to focus on nearby objects. It results from an error of refraction in which rays of light entering the eye parallel to the optic axis are brought to a focus behind the retina.

OBS

hypermetropia: term recommended by the Medical Signs and Symptoms Committee.

French

Domaine(s)
  • Troubles de la vision
DEF

Défaut de réfraction oculaire caractérisé par la focalisation en arrière de la rétine des objets éloignés.

Spanish

Campo(s) temático(s)
  • Trastornos de la visión
DEF

Estado refractivo del ojo en que sin acomodar la imagen del objeto se forma por detrás de la retina, es decir, focaliza los rayos por detrás de la retina por lo que los objetos lejanos, sin acomodar, se ven borrosos.

OBS

En este estado refractivo se activa el mecanismo de la acomodación para ver los objetos lejanos nítidos por lo que el músculo ciliar está en constante esfuerzo.

Save record 12

Record 13 2012-01-17

English

Subject field(s)
  • Medical Instruments and Devices
  • Visual Disorders
DEF

An instrument for measuring the degree of ametropia.

OBS

ametropia : Discrepancy between the size and refractive powers of the eye, such that images are not brought to proper focus on the retina.

French

Domaine(s)
  • Instruments et appareillages médicaux
  • Troubles de la vision
DEF

Appareil servant à mesurer l'amétropie.

Spanish

Save record 13

Record 14 2011-02-18

English

Subject field(s)
  • Scientific Instruments
  • Optics
  • Analytical Chemistry
CONT

... a spectroscope or spectrograph... are effectively the same thing except that a spectroscope is simply used for visual inspection(that is, your eye is the detector), while a spectrograph includes some means(photographic film or an electronic detector) for recording the spectrum for analysis. In professional astronomy these days there is very little need for a spectroscope... a spectrograph in its simplest form,... is a light-tight box with a small(often narrow rectangular or adjustable) opening to let light in, a grating to break the light into its components, and a "detector" of some kind placed at the proper angle and distance from the grating to record the spectrum of the wavelength range of interest. Telescopes are used to gather the faint light from distant objects, and the spectrographs are placed at the focus of the telescope to analyze the light.

French

Domaine(s)
  • Instruments scientifiques
  • Optique
  • Chimie analytique
DEF

Appareil équipé d'un récepteur d'images qui explore le spectre dans l'espace (plaque photographique, récepteurs photoélectriques d'image).

CONT

Les spectrographes possèdent un système dispersif (prisme, réseau), comme les spectromètres mais, à la différence de ceux-ci, ils reçoivent et enregistrent sous forme d'image la totalité des radiations dispersées.

Spanish

Campo(s) temático(s)
  • Instrumentos científicos
  • Óptica
  • Química analítica
Save record 14

Record 15 2008-11-03

English

Subject field(s)
  • Radiography (Medicine)
DEF

A fluoroscopic technique in which a dual focus is used to provide projection images of the subject from two slightly different perspectives. By displaying the images such that one eye of the observer views the images from one of the two views and the other eye views the other image, the observer can perceive the images with a three-dimensional perspective.

French

Domaine(s)
  • Radiographie (Médecine)

Spanish

Save record 15

Record 16 2002-12-10

English

Subject field(s)
  • Facilities and Instruments (Astronomy)
  • The Stars (Astronomy)
CONT

The Star Collimator has an internal reticle... that can be independently focused by turning the eyepiece barrel(similar to focusing the adjustable eyepiece in a pair of binoculars). Once the reticle is in sharp focus... for your eye, the star image is de-focused until it fills all 10 rings of the reticle. Use a fairly bright star, and use the eyepiece in the "straight-through" mode of the rear of your scope.

French

Domaine(s)
  • Installations et instruments (Astronomie)
  • Étoiles (Astronomie)

Spanish

Save record 16

Record 17 2002-04-08

English

Subject field(s)
  • Optics
  • Weapon Systems
CONT

When the sleeve is folded back, the extra space from the exit lens to the point of focus accommodates prescription glasses or even gas masks. This is called eye relief and is usually between 12 and 22 millimetres.

French

Domaine(s)
  • Optique
  • Systèmes d'armes

Spanish

Save record 17

Record 18 1999-05-07

English

Subject field(s)
  • Simulation (Cybernetic Systems)
  • Technical Aids for Persons with Disabilities
CONT

For those with poor eyesight, a miniature, MEMS-based VRD would have the advantage that the narrow beam of light shining into the eye would have great brightness and depth of focus making it clear and sharp, regardless of the shape or optical properties of the viewer's eyeball.

OBS

MEMS: micro-electrical mechanical system.

French

Domaine(s)
  • Simulation (Systèmes cybernétiques)
  • Aides techniques pour personnes handicapées
OBS

Voir dispositif d'affichage rétinien virtuel

Spanish

Save record 18

Record 19 1998-12-03

English

Subject field(s)
  • Visual Disorders
OBS

In dark adaptation... shorter wavelengths come into focus in front of the retina, and this chromatic aberration accounts for some of the relative myopia that a normal eye experiences at night.

French

Domaine(s)
  • Troubles de la vision
DEF

Augmentation de la réfraction (essentiellement due à l'accommodation) qui arrive quand le niveau d'éclairage est faible.

OBS

Source MVISI-F : Le nouveau dictionnaire de la vision par Michel Millodot, Médiacom Vision Éditeur, 1997.

Spanish

Save record 19

Record 20 1995-01-02

English

Subject field(s)
  • Translation

French

Domaine(s)
  • Traduction
OBS

Dans les descriptions de travail.2

Spanish

Save record 20

Record 21 1993-09-22

English

Subject field(s)
  • Optics
  • Land Forces
CONT

The performance of binoculars is quantified by terms such as level of magnification, objective lens diameter, twilight performance factor, exit pupil diameter, transmission, resolving power and field of view. The list of "niceties" includes dioptric adjustment range, individual ocular adjustment, eye relief and individual focus.

French

Domaine(s)
  • Optique
  • Forces terrestres
CONT

Certaines de ces qualités sont quantifiables, comme le grossissement, le diamètre de l'objectif, le facteur de mérite, le diamètre de pupille de sortie, la transmissibilité et le champ.

Spanish

Save record 21

Record 22 1988-11-04

English

Subject field(s)
  • Shooting (Sports)
CONT

The eye's focus is on the target, the front head is seen peripherally and the eye serves as the rear sight. This is point shooting, not instinctive shooting. The shooter can focus his/her attention on the target.

French

Domaine(s)
  • Tir (Sports)

Spanish

Save record 22

Copyright notice for the TERMIUM Plus® data bank

© Public Services and Procurement Canada, 2025
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau

Display options

Change the order of display of the official languages of Canada
Option to display the non-official languages (Spanish or Portuguese)
Display definitions, contexts, etc., on records

Features

Language Portal of Canada

Access a collection of Canadian resources on all aspects of English and French, including quizzes.

Writing tools

The Language Portal’s writing tools have a new look! Easy to consult, they give you access to a wealth of information that will help you write better in English and French.

Glossaries and vocabularies

Access Translation Bureau glossaries and vocabularies.

Date Modified: