Dictionary » V » Visual acuity

Visual acuity

visual acuity

(Science: 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 threshold delectability, or the detection of misaligned steps in a line (which is also a form of visual acuity), can be as low as a fraction of a second of arc. Sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart).


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not well read is he?

... falling from) intact skin. Other signs and symptoms include: changes in visual acuity, balance problems, bloating and swelling of legs, neurological symptoms, including changes ...

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by Sabrina
Thu Jan 11, 2007 10:23 pm
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 5426776

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... falling from) intact skin. Other signs and symptoms include: changes in visual acuity, balance problems, bloating and swelling of legs, neurological symptoms, including changes ...

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by J Jill
Mon Jan 08, 2007 1:42 am
 
Forum: Human Biology
Topic: The Fiber Disease
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... what way has this helped problems that may have been experienced with visual acuity, e.g.? How long, (and please cite exact drugs and dosages), would an individual have ...

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by Cilla
Mon May 08, 2006 4:25 pm
 
Forum: Human Biology
Topic: The Fiber Disease
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The Fiber Disease

... is due in part to the small pupil, and cholinergic mechanisms in the visual pathways also contribute. The complaint of blurred vision is less ... as objective testing usually indicates an improvement in visual acuity because of the "pin-hole" effect. Conjunctival injection ...

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by London
Sun Apr 16, 2006 3:45 pm
 
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Cheetah and leopard

... surroundings. The dark tear marks beneath each eye may also enhance its visual acuity by minimizing the sun's glare. The spine works as a spring for the powerful back legs ...

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by Ange
Wed Jun 08, 2005 3:10 am
 
Forum: Zoology Discussion
Topic: Cheetah and leopard
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Views: 37585


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