论文部分内容阅读
一般说来,人到老年都要戴眼镜,不论你原来有没有近视、远视或散光。 老花眼在医学上叫老视眼。人到了40岁以上,随着年龄的增加,睫状肌肌力逐渐减弱,晶体核增大,晶状体的硬度渐渐增高,而晶状体的弹性和可塑性却越来越低。由于眼的调节力减退,所以看近物不清,而看远则不受影响。这就是老花的表现。这时欲要看清近物,就需要戴一副老花镜。
In general, people should wear glasses to old age, whether you have myopia, farsightedness or astigmatism. Presbyopia in medicine called presbyopia. People over the age of 40, with age, ciliary muscle strength gradually weakened, the nucleus increases, the lens hardness gradually increased, while the lens elasticity and plasticity is getting lower and lower. Due to diminished eye regulation, so close look unclear, but look far is not affected. This is the performance of presbyopia. At this time want to see something close, you need to wear a reading glasses.