爱眼、护眼常常是对学生的口号,其实对中老年人也同样重要。视力减退和各种眼疾常常是人体老化的先兆,其中最主要也最普遍的现象是调节力减弱。一般40岁左右渐渐会感觉到看书报时放远一点较为清晰舒服,然而阅读一长又会感到困难,这就是我们平日讲述的老花。老花是一种正常的生理现象,随着年龄的进一步增加,眼调节力逐渐下降,影响了工作和学习,需要正透镜帮助才能看清。 Love eye, eye protection is often the slogan to the students, in fact, is equally important to the elderly. Hypoglycemia and various eye diseases are often the precursors of the aging of the human body, the most common of which is the diminished accommodative power. Generally about 40 years old will gradually feel reading a book a little longer and more clear and comfortable, but reading a long will feel difficult, this is what we usually talk about presbyopia. Presbyopia is a normal physiological phenomenon, with the further increase of age, eye regulatory power gradually decreased, affecting the work and study, you need to be positive lens help to see.