| 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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| astigmatism |
a distortion of the image on the retina caused by irregularities in the cornea or lens.
출처: medical.preferredconsumer.com/laser_eye_surgeons/L...
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| astigmatism |
A condition when the Cornea, (sometimes the lens) curves differently in different directions (a slice through a football). This causes objects (light) to bend differently to focus on the retina. The image is thus blurred, ghosted, or blurred unless corrected by contact lenses or spectacles.
출처: www.eyecaretyler.com/knowmore.htm
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