long-sightedness造句

• Cataract and long - sightedness are common problems
  -常见的问题如:白内障及老花
• Hyperopia long - sightedness a long - sighted or hyperopic eye is shorter than normal
  远视的主要成因是眼球长度比正常短或角膜的弧度不足。
• Astigmatism is caused by differences in the curvature of the cornea in different meridians , distorts the light rays entering the eye and prevents them from focusing sharply . astigmatism can occur with short - sightedness and long - sightedness
  如果角膜稍有弧度不一，某一面弧度较弯，而另一方较扁平，光线便不能准确地聚焦在视网膜上，这种情况便称为散光。