| 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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| astigmatism |
(uh-STIG-muh-tiz-um). Refractive error. Optical defect in which refractive power is not uniform in all directions (meridians). Light rays entering the eye are bent unequally by different meridians, which prevents formation of a sharp image focus on the retina. Slight uncorrected astigmatism may not cause symptoms, but a large amount may result in significant blurring and headache.
출처: www.howardnations.com/blindness/blindness_glossary...
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| astigmatism |
results from an irregularly-shaped or football-shaped cornea which causes light to refract ineffectively. Vision irregularities depend on the exact nature of the astigmatism.
출처: www.emoryhealthcare.org/departments/eye_center/sub...
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| astigmatism |
The aberration in which the horizontal and vertical lines are focused at different points along the optical axis.
출처: www.bi-optic.com/vocab.html
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