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 ?
Multicenter clinical trial results demonstrate that the personalized topography-guided LASIK procedure Contoura Vision redefined the standard practice terminology of "quality of vision" which is visual acuity combined with visual symptoms, with more than 30% of eyes achieving better unaided visual acuity 12 months after surgery than with glasses or contact lenses prior to surgery.
Those who had previously received Lucentis had better visual acuity at the start of the study and, on average, maintained their visual acuity after 12 months.
If their scores on the National Eye Institute Visual Function Questionnaire (NEI VFQ) differ, we cannot assume that the person who reports worse functional vision (that is, has a lower NEI VFQ score) has worse visual acuity than a person with a higher score (Mangione et al.
TM-24-13 provides a brief history of how spectrum affects visual acuity in interior lighting applications and includes in-depth analysis of some of the more important research papers on the topic.
05), and a precision error of 5% to detect a difference of 20% or more in the week 8 postoperative uncorrected visual acuity between the 2 groups, the required sample size was calculated to be 266.
Damage to semicircular canals and/or otolith organs causes impaired visual acuity during head rotation (DVA); impaired balance and postural control; and symptoms of vertigo, falling, nausea, and disorientation [10-18].
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.
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.
5 mg ranibizumab lost fewer than 15 letters in visual acuity from baseline versus 62 percent of patients in the placebo controlled group.