Simple Test for Astigmatism
角膜散光简易测试
 | The lines of this fan diagram were drawn to be the same width and darkness. If some appear to be distinctly darker and more sharply focused, it is likely that your eyes have some astigmatism. 扇形图中的这些线条是画成相同宽度和深浅的。如果某些线条看起来明显更暗且更集中，很可能是因为你的眼睛有一定程度的散光。 |
A common form of astigmatism results in different focal lengths for different incident light planes. When a person with astigmatism looks at the pattern, the eye will focus most sharply for one plane and the lines near that plane will appear darker and more distinct. 一种常见的散光形式会导致不同入射光平面具有不同的焦距。当有散光的人看这个图案时，眼睛会最清晰地聚焦于一个平面，该平面附近的线条会显得更暗且更清晰。 |  |
| Common eye defects
常见的眼睛缺陷 | Show corrected vision
显示矫正视力 |
Vision concepts
索引视图概念
| HyperPhysics***** Light and Vision
HyperPhysics ***** 光与视觉 | R Nave |
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