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Long-sightedness长期近视

Hypermetropia is a sight problem that affects your ability to see close-up objects.远视是一种忽视的问题，会影响您能够看到贴近了对象。 Commonly known as long-sightedness, the condition is a type of focussing error, and tends to get worse as you get older.众所周知，只要近视，条件是一种集中的错误，并往往变得更糟，因为你年纪。

Sight problems are very common, and many people are either long or short-sighted.忽视的问题是非常普遍，许多人都是长期或短视的。 Although sight problems sometimes run in families, there are no other significant factors why some of us have better vision than others.虽然视线的问题，有时运行在家庭，有没有其他的重要因素，为什么我们有些人有更好的视野比别人。 Long-sightedness can be easily corrected with glasses, contact lenses, or corrective surgery.长期近视可以很容易地纠正与眼镜，隐形眼镜，或纠正手术。

How does the eye work?请问眼睛的工作呢？

The eye is made up of three parts:眼睛是弥补了由三部分组成：

  • the cornea and lens, which focus light at the front of the eye,角膜和晶状体，其中重点轻在前面的眼睛，
  • the retina, a light sensitive film at the back of the eye, and在视网膜上，一辆轻型敏感的电影在后面的眼睛，和
  • the optic nerves- a large collection of communication wires to the brain.视神经-一个大的集合通信电线到大脑。

The eye works by focussing light rays on the retina.眼睛的作品集中光线对视网膜。 These rays of light first travel through the transparent cornea, and then through the lens, which helps to focus the light.这些光芒第一旅行透过透明的角膜，然后透过镜头，这有助于把重点放在轻。 The image that forms on the retina is transformed into electrical signals, which the nerves carry to the brain so that it can tell us what we are seeing.形象的形式对视网膜转化为电信号，神经进行到大脑，以便它可以告诉我们，我们所看到的。

Long-sightedness occurs when the eyeball is too short in relation to the focusing power of the cornea and lens.长期的近视发生时，眼球是太短，在关系到集中的权力，角膜和晶状体。 This means that light rays travel to the back of the retina before they have been bent by the cornea and lens.这意味着，光线旅行到后端的视网膜之前，他们已执意要由角膜和晶状体。 Close-up objects therefore appear blurry because the light rays have not been focussed properly.密切跟进的对象，因此出现模模糊糊的，因为光线没有被集中妥善。 Long-sighted children often find it easy to see distant objects clearly, because the lens is flexible in young eyes and able to focus easily.长期的弱视儿童常常发现，很容易看到远处的物体清楚，因为镜头是灵活的年轻的眼睛和能够集中精力容易。 As you get older, it becomes more difficult to focus, and the way that you see distant objects may also be affected.正如你年纪，它变得更加困难，以重点，方式，您会看到远处的物体也可能受到影响。