When the cornea curves or flattens unevenly, the result is astigmatism, which disrupts focus of near and distant vision.
散光是当角膜变弯或者变平时表面不平坦，影响视近、视远时的聚焦。
This is because the distance from the eyes to the keyboard or music stand is intermediate between reading and distant vision.
因为在弹奏时眼睛与键盘或乐谱的距离正好在平时阅读视距和眺望远处的物体之间。
Conclusion the new type of 2.5x monocular or binocular telescopes can effectively improve the distant vision of low vision patients.
结论新型国产两用望远镜助视器具有较高的临床使用价值，可作为低视力患者看远常用的助视器。
That can be addressed with multifocal lenses, which have concentric rings of material that offer alternate bands of near and distant vision.
这个问题可以使用多焦点人工晶体来解决，它拥有一些同心圆环，该圆环上的物质能提供交替调节近距离和远距离视力的区带。
If your children are early readers, 15 or 20 minutes at a time is enough for children under ages 8 to 10. They can use a kitchen timer. Then take an hour or two for distant vision play.
如果你的孩子开始得比较早，8至10岁以下的每次15或20分钟就足够了，可以让他们用厨房定时器，然后进行一两个小时视线远的游戏。
About 500 of the drivers suffered from either defective near vision or distant vision, Parimoo added. Another 25 suffered from color blindness, while five had irreparable vision damage.
这位所长还说，大约有500名司机患有近视和远视，25人有色盲，5人的视力曾经遭受不可修复的损害。
Farsightedness is the opposite, in a way: A shorter-than-average eyeball or too-flat cornea focuses light behind the retina instead of on it, making near vision and sometimes distant vision blurry.
远视在某种程度上则相反，是较正常短些的眼球前后径或者太平坦的角膜使光线聚焦于视网膜后而不是之上，这导致近景视觉模糊和有时的远景视觉模糊;
If your trouble is with distant instead of near vision, use the same method with distant letters.
如果你的烦恼是远视力而不是近视力，就把这个方法用到远处的文字上。
If only to depict the success, vision for the future, when we talk, the loss of practice, in our hesitation, the loss of exploration, success can only be a distant dream.
如果只去描绘成功，憧憬未来，在我们高谈阔论时，失去了实践，在我们犹豫不决时，失去了摸索，成功只能是一个遥远的梦境。
If only to depict the success, vision for the future, when we talk, the loss of practice, in our hesitation, the loss of exploration, success can only be a distant dream.
如果只去描绘成功，憧憬未来，在我们高谈阔论时，失去了实践，在我们犹豫不决时，失去了摸索，成功只能是一个遥远的梦境。
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