| astigmatism |
irregularities in the shape of the cornea resulting in difficulties focusing
출처: www.ski.org/AMNorcia_lab/General/terms.html
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|---|---|
| astigmatism |
this is a form of vision problem that causes an image to be improperly reflected on the retina. This results from a misshapen cornea or lens.
출처: www.lasik-eye-surgery.info/explanation-of-terms.ht...
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| astigmatism |
A visual defect in which the unequal curvature of one or more refractive surfaces of the eye, usually the cornea, prevents light rays from focussing clearly at one point on the retina, resulting in blurred vision.
출처: www.keratoconus-group.org.uk/glossary.html
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| astigmatism |
Astigmatism blurs vision at all distances because the optical parts of the eye (cornea and lens) do not focus light onto the retina clearly. This condition is quite common, and results from an unequal curve of the cornea when comparing the horizontal and vertical planes. For descriptive purposes, imagine half of a tennis ball, squeezed at the top and bottom; the ball is now curved unequally. In the eye, this results in inaccurate focus on the retina. ...
출처: www.infantsee.org/x3635.xml
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| astigmatism |
is an optical aberration that spreads the image out into an ellipse or line. It can be caused by poorly made or mounted optics that distort the mirror or lens.
출처: www.telescopehouse.co.uk/page.aspx
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