老花眼在医学上叫老视眼,这是人的衰老在眼睛上的表现。通常有一种说法.说近视眼不花,这种说法是不对的。 四十岁以上的人,随着年龄的增长,睫状肌肌力逐渐减弱,晶体核渐渐增大,晶状体的硬度逐渐增高,而晶状体的弹性和可塑性逐渐减低。当看近物时,晶状体需要变凸,才能将物象聚焦在视网膜上,看清近物。当眼花时,由于睫状肌肌力减弱,晶状体变硬, Presbyopia in medicine called presbyopia, which is the performance of human aging in the eyes. Usually there is a saying that myopia does not spend, this argument is wrong. With age over 40 years old, ciliary muscle strength gradually weakened, the nucleus gradually increased, the hardness of the lens gradually increased, while the lens elasticity and plasticity gradually reduced. When looking at near objects, the lens needs to convex, in order to focus on the retina in the image, see close objects. When dazzled, due to ciliary muscle weakening, lens hardening,