Many people think that nearsighted people are not presbyopia. Actually, this statement is wrong. Because nearsighted people, like others, will have a series of aging and degeneration with their age. First of all, the nucleus of the lens gradually becomes bigger and harder, and the elasticity of the lens becomes smaller and smaller. Secondly, the muscle strength of ciliary muscle gradually weakens, making it difficult to read and write when looking close to the target. This is presbyopia, commonly known as presbyopia.

However, the performance of nearsighted people after presbyopia is different from that of people with normal eyes, so they need different glasses. Generally, people who look straight at their eyes begin to presbyopia after the age of 40. At the age of 45, the presbyopia is about+1.00-+1.50d. At the age of 50, the presbyopia of people aged 55, 60 and 70 is about +2.50D, +3.00d and +4.00D respectively. For example, a person with myopia of -3.00D, no matter how old he is, will always wear his original myopia glasses in the distance as long as his myopia remains unchanged. However, with the growth of age, after 40 years old, the glasses needed for reading, writing or doing close-up subtle work are constantly changing. For example, when he is 50 years old, his eyes are also presbyopia of +2.00. Then, the glasses he wears when he looks close should be-1.00 (-3.00d)+(+2.00) =-1.00d).

That is, myopia-1.00d. Similarly, when he is 60 and 70 years old, he should look at the glasses near him with zero (natural light) and+1.00D respectively. ?

Therefore, in real life, we often see that old people who used to wear short-sighted glasses often need to take off their short-sighted glasses when reading and writing. Some people, even if they take off their glasses, are still not suitable for close-up, and need to move the target closer or farther. These are actually caused by presbyopia in different degrees on the basis of myopia. ?

In this way, we come to a conclusion that the degree of glasses a nearsighted person wears after presbyopia should be the algebraic sum of his original myopia degree and the presbyopia degree he should wear at that age, and the degree after the two are offset is the degree of glasses he should wear when he looks near. However, it is not so simple to equip myopia with reading glasses in our center. However, we should also take into account personal physique, nutrition, working environment, professional requirements, personal habits and other factors, and fully try on the glasses before the final fitting, so as to match a suitable pair of reading glasses for myopia patients.