Abstract: from the definition of myopia and presbyopia, myopia is to see the near place clearly, see the far distance clearly, and need to wear myopia glasses; Presbyopia is a physiological phenomenon that the middle-aged and elderly people over the age of 40 are less and less clear about the near, and the distance is the same as when they were young.
many people believe that people with myopia will not have presbyopia, which is a big misunderstanding. Presbyopia is a physiological phenomenon that no one can escape. It tells you that the eyes are aging.
from the definition of myopia and presbyopia, myopia is to see the near place clearly, see the far distance clearly, and need to wear myopia glasses; Presbyopia is a physiological phenomenon that the middle-aged and elderly people over the age of 40 are less and less clear about the near, and the distance is the same as when they were young.
the elderly without myopia do not need to wear glasses when looking far, and presbyopic glasses when looking close. Myopia glasses are “-” lenses and reading glasses are “+” lenses. When people with myopia look close, the degree of glasses can be offset by positive and negative, while they are still myopia when they look far. The degree of presbyopia of
gradually deepens with age, generally increasing at the rate of 50 degrees every five years. The degree of presbyopia is usually about + 100 to + 150 degrees at the age of 45, about + 200 degrees at the age of 50 and up to + 300 degrees at the age of 60. After that, the degree of presbyopia is generally no longer deepened.
so people with myopia should refer to their myopia when wearing reading glasses. For example, for the elderly over 60 years old with myopia of – 500 degrees, the degree of presbyopia is about + 300 degrees. When looking close, the positive and negative offset 300 degrees. When looking close, they also need myopia glasses of – 200 degrees. In life, we often see some nearsighted old people who take off their nearsighted glasses when reading, and sometimes move the books appropriately near or far away, because they have different degrees of presbyopia on the basis of different degrees of nearsightedness, and the residual degrees are different after some degrees of nearsightedness offset each other.
at present, there are also some special glasses suitable for these people who are both old and short-sighted, such as bifocal glasses, multifocal glasses, etc. However, these glasses do not change with good matching. With the growth of age and the occurrence of cataract, the degree of myopia and presbyopia will change. Maybe you need to change your glasses in 2-3 years.
presbyopia has a certain relationship with the degree of eye use. If your eyes are too tired, presbyopia will report in advance. Just over the age of 40, when you are young and promising, no one wants to wear reading glasses, so you need to pay more attention at ordinary times and don’t always make your eyes tired. First of all, we should ensure adequate sleep, at least 6 hours a day, and go to sleep before 11 o’clock every night to ensure full rest. Secondly, reduce the time to look at the computer and mobile phone. Let your eyes rest between close work, usually 10 minutes. You can keep your eyes away from the computer screen or books, look into the distance, do office exercises and eye exercises, and move the lumbar spine and cervical spine, which is of great benefit to the protection of your eyes. In addition, pay attention to eating more vegetables and fruits, and supplement a variety of vitamins and minerals, which is very helpful to maintain a healthy and young state and delay aging.