What is the relationship between presbyopia and myopia?

Abstract: we often see in real life that the elderly wearing the original myopia glasses often need to take off the myopia glasses when reading and writing. Even if some people take off their glasses, it is still inappropriate to look close, and they still need to move the target closer or farther., Many people think that people with myopia are not old. In fact, this statement is wrong. Because people with myopia, like others, have a series of aging and degeneration phenomena in their eyes with the growth of age. Firstly, the nucleus of the lens gradually increases and hardens, and the elasticity of the crystal becomes smaller and smaller. Secondly, the muscle strength of the ciliary muscle gradually weakens. Therefore, when looking at nearby targets, there is a lack of necessary adjustment, resulting in difficulties in reading and writing. This is presbyopia, commonly known as presbyopia., However, the performance of people with myopia after aging is different from that of people with normal emmetropia, so the degree of glasses required is also different. Generally, people with emmetropia begin to grow old after the age of 40. At the age of 45, it is about + 1.00 – + 1.50D, at the age of 50, it is about + 2.00d, and at the age of 55, 60 and 70, it is about + 2.50d, + 3.00ds and + 4.00d respectively. However, the number of glasses needed by people with myopia after the occurrence of aging depends on their original myopia and their specific age. For example, a person with myopia-3.00d, no matter how old he is, as long as his myopia remains the same, he will always wear his original myopia glasses in the distance. However, with the increase of age, after the age of 40, the degree of glasses he needs when reading, writing or doing close-up fine work is constantly changing. For example, when he reaches the age of 50, his eyes also have + 2.00 old flowers. Then, the degree of glasses he wears when looking close should be -1.00 ((- 3.00d) + (+ 2.00) = – 1.00d), that is, myopia -1.00d. Similarly, when he was 60 and 70, The glasses he wears when he looks close should be zero degrees (Ben Guang) and + 1.00d. Therefore, we often see in real life that the elderly wearing the original myopia glasses often need to take off the myopia glasses when reading and writing. Some people still need to move the target closer or farther even if they take off the glasses. In fact, all these are due to the occurrence of myopia on the basis of myopia Caused by old flowers of the same degree., In this way, we come to a conclusion that the degree of glasses a nearsighted person wears when he has presbyopia should be the algebraic sum of his original degree of myopia and the degree of presbyopia at that age, and the degree after the two offset is the degree of glasses he should wear when he looks near. However, when we match presbyopic glasses for myopia, it can’t be so simple. It is also necessary to take into account the specific conditions of the individual wearer, such as personal physique, nutrition, working environment, professional requirements and personal habits, and then fully try them on before finally matching them, so as to match a pair of suitable presbyopia glasses for myopia.,

many people think that people with myopia are not old. In fact, this statement is wrong. Because people with myopia, like others, have a series of aging and degeneration phenomena in their eyes with the growth of age. The first is that the nucleus of the lens gradually increases and hardens, and the elasticity of the crystal becomes smaller and smaller. The second is that the muscle strength of the ciliary muscle gradually weakens. Therefore, when looking at the nearby target, it lacks the necessary adjustment power and has difficulty in reading and writing. This is presbyopia, commonly known as presbyopia.

however, the performance of people with myopia after presbyopia is different from that of people with normal emmetropia, so the degree of glasses required is also different. Generally, people with emmetropia begin to grow old after the age of 40. At the age of 45, it is about + 1.00 – + 1.50D, at the age of 50, it is about + 2.00d, and at the age of 55, 60 and 70, it is about + 2.50d, + 3.00ds and + 4.00d respectively. However, the number of glasses needed by people with myopia after the occurrence of aging depends on their original myopia and their specific age. For example, a person with myopia-3.00d, no matter how old he is, as long as his myopia remains the same, he will always wear his original myopia glasses in the distance. However, with the increase of age, after the age of 40, the degree of glasses he needs when reading, writing or doing close-up fine work is constantly changing. For example, when he reaches the age of 50, his eyes also have + 2.00 old flowers. Then, the degree of glasses he wears when looking close should be -1.00 ((- 3.00d) + (+ 2.00) = – 1.00d), that is, myopia -1.00d. Similarly, when he was 60 and 70, When he looks close, the glasses he wears should be zero (local light) and + 1.00d respectively.

Therefore, we often see in real life that the elderly who wear the original myopia glasses often need to take off the myopia glasses when reading and writing. Even if others take off their glasses, it is still inappropriate to look close, and they still need to move the target closer or farther. All these are actually caused by different degrees of aging on the basis of myopia.

in this way, we come to a conclusion that the degree of glasses a nearsighted person should wear when he has presbyopia should be the algebraic sum of his original degree of myopia and the degree of presbyopia at that age, and the degree after the two offset is the degree of glasses he should wear when he looks near. However, when we match presbyopic glasses for myopia, it can’t be so simple. It is also necessary to take into account the specific conditions of the individual wearer’s personal physique, nutrition, working environment, professional requirements and personal habits, and then after full trial wearing, finally fit the glasses in a specific degree, so as to match a pair of suitable presbyopia glasses for the myopia.