visual acuity


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visual acuity

n.
Sharpness of vision, especially as tested with a Snellen chart. Normal visual acuity based on the Snellen chart is 20/20.

vis′ual acu′ity



n..
acuteness of the vision as determined by a comparison with the normal ability to identify certain letters at a given distance, usu. 20 ft. (6 m).
[1885–90]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.visual acuity - sharpness of visionvisual acuity - sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart)
visual modality, visual sense, vision, sight - the ability to see; the visual faculty
20/20, twenty-twenty - normal visual acuity, as measured by the ability to read charts at a distance of 20 feet
oxyopia - unusually acute vision
Translations
References in periodicals archive ?
The Results: More than 1O% of those in the study had uncorrected visual acuity of 20/40 or worse.
This key role has both internal and customer-facing dimensions, as Blair Parkin, managing director, Visual Acuity, explains:"The technological scope of our work continues to develop, as does our geographical reach -- we are currently working on projects as far afield as Asia, the Middle East, the US and Europe.
The CSC with early presentation (34) had attained visual acuity of 6/9 to 6/6 at follow up at three months with preserved profile of outer photo receptor layer.
Because many children with farsightedness can "achieve near-normal" on a visual acuity test, some might argue it is not important to detect their condition.
If such signs were present, or if the patient showed a decline in visual acuity, the treatment interval was shortened by 2 weeks.
No case had further deterioration of visual acuity after Nd-YAG laser capsulotomy.
Testing of visual acuity using the Snellen Chart (the standard eye chart used by eye care professionals to measure visual acuity) showed a significant improvement from baseline 14/20 to 17/20 after two months of treatment with Pycnogenol.
For the 1999-2000, 2001-2002, and 2003-2004 surveys, participants also were asked questions regarding vision function, and the physical examination included a vision examination in which visual acuity was measured before and after an objective autorefraction test (optical correction measured by all autorefractor).
rex might have had visual acuity as much as 13 times that of people.
All patients had visual acuity measured with a Snellen acuity chart.
The World Health Organization (WHO/estimates that approximately 124 million people have low vision, which it defines as visual acuity between 20/60 and 20/400 with the best possible correction or a visual field of 20 degrees or less.