人过中年,有些人往往为读书看报时视觉模糊而倍感困扰。其实,人体各器官都要经历发育、成长、成熟和衰老的过程,随着年龄增长眼睛同样有明显的生理变化。日常生活中,四十岁以上的人一般首先出现近距离(25～30厘米)字迹模糊、阅读疲劳,即所谓老视眼,俗称“老花眼”,需配戴凸透镜进行纠正。实际上,所谓老视只是近距离视力的一种异态。其与远距离视力障碍无关。除非同时有其它屈光异态(远视、近视、散光)的存在,老视眼的远距离视力是不受影响的。 When people are in middle age, some people often feel distressed when reading a newspaper. In fact, all organs of the human body have to undergo the process of development, growth, maturation and aging. As the age grows, the eyes also have obvious physiological changes. In daily life, people over the age of 40 generally first appear close-spaced (25-30 cm) handwriting is fuzzy, reading fatigue, the so-called presbyopia, commonly known as “presbyopia”, to wear convex lens to be corrected. In fact, the so-called presbyopia is only a short-range vision of an anomaly. It has nothing to do with long-distance vision disorders. Unless there are other refractive abnormalities (hyperopia, myopia, astigmatism) the existence of presbyopia long-distance vision is not affected.