1) Medical sign
Found on
https://www.crosswordclues.com/clue/visual-acuity
Visual acuity (VA) is acuteness or clearness of vision. It depends on optical and neural factors, i.e., (i) the sharpness of the retinal focus within the eye, (ii) the intactness and functioning of the retina, and (iii) the sensitivity of the interpretative faculty of the brain. A common cause of low visual acuity is refractive error (ametropia), ...
Found on
http://en.wikipedia.org/wiki/Visual_acuity
The capacity of the eye for seeing distinctly the details of an object at a specific distance.
Found on
http://eyediologyopticians.co.uk/pages/Eye-terms-explained.html
(from the article `eye, human`) As has been stated, the ability to perceive detail is restricted in the dark-adapted retina when the illumination is such as to excite only the ... Although the resolving power of the retina depends, in the last analysis, on the size and density of packing of the receptors in the retina, it is ... ...p...
Found on
http://www.britannica.com/eb/a-z/v/30
1. qualitatively : Capacity for seeing distinctly fine details that have very small angular separation 2. quantitatively : Any of a number of measures of spatial discrimination such as the reciprocal of the value of the angular separation in minutes of arc of two neighbouring objects (points or lines or other specified stimuli) which the observer c...
Found on
http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=845-02-43
<microscopy> The ability to detect fine details or small distances with the eye. Visual acuity can vary substantially depending on the definition used and method of measurement chosen. Under favourable conditions, the resolution of the human eye or ability to distinguish the twoness of adjoining lines, is about I minute of arc while the thres...
Found on
http://www.encyclo.co.uk/local/20973
Clearness of vision. The ability to distinguish details and shapes of objects; also called central vision.
Found on
http://www.encyclo.co.uk/local/21361
Assessment of the eye's ability to distinguish object details and shape, using the smallest identifiable object that can be seen at a specified distance (usually 20 ft or 16 in)
Found on
http://www.eyeglossary.net/
Sharpness of vision.
Found on
http://www.gadsbywicks.co.uk/uploaded/3822.pdf
(V) Type: Term Synonyms: resolution acuity
Found on
http://www.medilexicon.com/medicaldictionary.php?t=999
Visual acuity: The clarity or clearness of the vision, a measure of how well a person sees. The ability to distinguish details and shapes of objects; also called central vision. The word 'acuity' comes from the Latin 'acuitas' = sharpness.
Found on
http://www.medterms.com/script/main/art.asp?articlekey=8241
a measure of the sharpness of a person's vision
Found on
https://www.encyclo.co.uk/local/20875
sharp-sightedness noun sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart)
Found on
https://www.encyclo.co.uk/local/20974
the space visible to an eye in a given position of gaze.
Found on
https://www.stanfordchildrens.org/en/topic/default?id=pediatric-glossary---
No exact match found.
