Ability of the eyes to distinguish object details and shape. Common visual activity measurement is 20/20.
The ability of an observer to resolve fine pattern detail. Acuity is usually specified in terms of decimal acuity, defined as the reciprocal of the smallest resolvable pattern detail in minutes of arc of visual angle. "Normal" or average acuity is considered to be 1.0 (a resolution of 1-min arc).
The ability of the eye to perceive the detail of objects in the direct line of sight. Visual acuity is measured by viewing standardized letters of varying sizes on a chart and is expressed as a ratio (e.g., 20/20).
Measurement of the sharpness of a patient's vision. Usually, a Snellen's chart is used for this test and the patient identifies letters from a distance of 20 feet.
Measurement of the visual ability and accuracy of the eye. Perfect vision is stated as 6/6 (in metres) or 20/20 (in feet).
sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart)
A measure of the ability to distinguish fine details.
Clarity of vision. Acuity is measured as a fraction of normal vision. 20/20 vision indicates an eye that sees at 20 feet what a normal eye should see at 20 feet; 20/400 vision indicates an eye that sees at 20 feet what a normal eye sees at 400 feet.
The smallest, fine detail you can see. Usually measured with a letter chart. But, can also be measured using pictures, black and white lines or visual evoked potentials (VEPs).
The finest detail that an eye can distinguish using LogMar or Snellen scales.
A measure of spatial resolution. The measure of the ability to visually discriminate.
the clearness of vision which depends upon the sharpness of the retinal image
The ability to see clearly at a distance. In Europe and the UK this is usually measure at 6 meters. It is usually given as a fraction where the top number is the distance at which the test is performed. The second figure is the level of vision. It is usual to think of 6/6 as normal. In the USA it is known as 20/20 because the distances are measured in feet instead of meters. The larger the number on the bottom of the fraction the worse the vision. Many people are able to see better than 6/6 and figures of 6/5 or even 6/4 are not uncommon.
The clarity of vision, allows an individual to discriminate details.
is simply the clearness of vision or the ability to distinguish details and shapes or objects.
the space visible to an eye in a given position of gaze.
Clarity and acuteness of vision.
The ability to discern fine detail.
sharpness of vision (ability of the eye to distinguish detail, especially for reading)
The ability of the eye to identify details; it is this vision that AMD erodes.
a measure of the sharpness of a person's vision
The ability to distinguish details and shapes of objects at varying distances. Go to Top
Another phrase for visual clarity, a measure of the eye`s ability to distinguish the shape of objects. Visual acuity is measured with a traditional eye chart, with the goal traditionally being 20/20.
The ability to distinguish details and shapes of objects; also called central vision.
The ability to see things at a given distance.
Sharpness of vision, usually as measured with the use of a Snellen chart. 20/20 is considered normal visual acuity, though some people can see even better (such as 20/15 or 20/10).
Another phrase for visual clarity, it refers to how clearly a person can see. Visual acuity is often measured with a traditional eye chart.
Strength of vision; example: A Visual Acuity (VA) of 20/20 is seeing at 20 feet what a normal eye sees at 20 feet; 20/200 is seeing at 20 feet what a normal eye sees at 200 feet, thus worse vision
Refers to the sharpness of vision.
Measurement of the eye's ability to distinguish the shape and size of an object.
The ability to see detail. Visual acuity is recorded as a fraction (e.g. 20/20). The top number signifies the distance in feet at which the test was performed (in this example 20 feet) and the bottom number represents the size of the test number or letter. Although written as a fraction, the number does not signify a proportion of normal vision. Another way to think about this is as a comparison of the eye being tested with the "normal" eye. A visual acuity of 20/200, for example, means that the eye being tested sees at 20 feet what the "normal" eye would be able to see at 200 feet.
Degree of sharpness of vision.
Ability to make fine discriminations among elements in a visual array by detecting contours, transitions in light patterns that signal borders and edges.
The ability to detect visual detail.
Visual acuity (VA) is acuteness or clearness of vision, especially form vision, which is dependent on the sharpness of the retinal focus within the eye, the sensitivity of the nervous elements, and the interpretative faculty of the brain.Cline D; Hofstetter HW; Griffin JR. Dictionary of Visual Science. 4th ed. Butterworth-Heinemann, Boston 1997.
