| astigmatism |
(ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea (optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point
출처: wordnet.princeton.edu/perl/webwn
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| astigmatism |
A refractive problem that occurs when the surface of the cornea is uneven or structurally defective, preventing the light rays from converging at a point.
출처: www.bdid.com/termsa.htm
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| astigmatism |
Instead of the front surface of the eye being round it is more oblong. This prevents the light being focused in the right way and leads to blurring. Astigmatism can be secondary to the shape of the cornea or the lens, and is usually correctable with spectacle or contact lenses.
출처: www.cochraneeyes.org/glossary.htm
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| astigmatism |
Condition in which the cornea's curvature is asymmetrical (the eye is shaped like a football or egg instead of a baseball); light rays are focused at two points on the retina rather than one, resulting in blurred vision. Additional symptoms include distorted vision, eyestrain, shadows on letters, squinting and double vision. Read more about astigmatism.
출처: www.allaboutvision.com/resources/glossary.htm
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| astigmatism |
A defect in optics in which a lens or mirror has two different amounts of curvature at 90 degrees to each other.
출처: home.earthlink.net/~dreyna14/glossary.htm
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