Abstract: the eyes of myopic patients also have aging and presbyopia, but the presbyopia degree of myopic patients is just neutralized by the myopia degree, so presbyopia behaves later than those with normal eyes. Generally, you can not wear presbyopia glasses or only wear a pair of presbyopia glasses with low degree., How do people with myopia choose reading glasses? Some people with myopia don’t need to wear reading glasses in their 60s. They can read and write as long as they take off their myopia glasses; But there are also some myopic patients who can’t see near without reading glasses. They need to wear a pair of reading glasses to read and write. What’s going on? How should myopia patients choose reading glasses?, Generally, after the age of 40 ~ 45, the phenomenon that you can’t see clearly when reading or doing other close work, and it increases year by year is called presbyopia in medicine, commonly known as presbyopia. There is a structure called lens in the eye. It is a double-sided convex lens with thick center and thin edge. It is equivalent to the zoom lens of the camera. Under the joint action of the ciliary body, it can adjust the eyes to see distant and close scenes at various distances. The completion of this process depends on the elasticity of the lens itself, the contraction and relaxation of ciliary body and the relaxation and tension of lens suspensory ligament. It is called regulatory function in medicine., With the increase of age, the elasticity of lens capsule decreases, the lens nucleus increases and hardens, the ciliary muscle weakens, and the regulation decreases, resulting in presbyopia. Presbyopia is a normal physiological phenomenon, just like people’s hair turns white at a certain age. The eyes of myopic patients also have aging and presbyopia, but the presbyopia degree of myopic patients is just neutralized by the myopia degree, so presbyopia behaves later than those with normal eyes. Generally, you can not wear presbyopia glasses or only wear a pair of presbyopia glasses with low degree. Theoretically, people with myopia greater than 400 degrees will never have presbyopia. But in fact, it is not necessarily because there are great individual differences in the accommodation of people’s eyes, which is why some patients with myopia need to wear reading glasses even if they have high myopia., At present, there are two methods to correct presbyopia, one is to wear presbyopic glasses, the other is surgical treatment. Surgical treatment is not very mature, so the most commonly used method is to wear reading glasses. Presbyopia is a kind of biconvex lens, which can supplement the lack of eye adjustment and achieve the purpose of correcting presbyopia. Before matching glasses, go to a regular hospital for optometry and check whether you have other eye diseases, determine whether there is myopia, hyperopia and astigmatism, and then increase or decrease the diopter according to age and presbyopia. The original myopia needs to subtract the degree of myopia from the degree of presbyopia at normal age. For example, the original 200 degree myopia is now 45 years old (the degree of presbyopia at normal age is 100 degrees). In fact, you can see nearby objects only by wearing 100 degree myopia lenses. If there is astigmatism, you need to integrate the astigmatism degree into the reading glasses. The relationship between the age of normal people and the degree of presbyopia is roughly as follows: of course, the degree of presbyopia should be appropriately increased or reduced in combination with the usual working distance of patients. If the working distance is close, the degree of presbyopia should be appropriately increased; On the contrary, the degree should be appropriately reduced. For more information about progressive films, please go to the hospital for detailed consultation., When wearing presbyopic glasses, it is also necessary to measure the distance between the pupils of two eyes and determine the distance between the optical centers of the lenses on both sides of the glasses. The two must be consistent, otherwise there may be prism effect, interfere with the visual function, and dizziness, dizziness, visual distortion, eye acid swelling, fatigue, etc. The selection of spectacle frame shall fully meet the optical requirements of the lens, and fully consider the distance between the pupils of two eyes and the inclination of the frame. A suitable frame shall be selected according to the size of the wearer’s eyes, face shape, eyebrow shape, etc. Large frames should be selected for those with large eyes, and smaller frames should be selected for those with small eyes. Fat round faces are suitable for wearing thick frames, thin and long faces are suitable for round frames, and flat round faces should use square frames with slightly narrow upper and lower frames. When selecting lenses, it should also be noted that glass lenses have high hardness and are not easy to scratch, but they are easy to be broken. The resin lens is light and not easy to be broken, but it has low hardness and is prone to scratches. Finally, we must understand that the accurate grinding of glasses is as important as accurate optometry. The grinding of glasses must be carried out in strict accordance with the glasses prescription prescribed by the doctor. Therefore, when wearing presbyopia glasses, you must go to the glasses Center of a regular hospital for medical optometry instead of wearing them casually.,
how to choose presbyopic glasses for people with myopia
some people with myopia don’t need to wear presbyopic glasses in their 60s. They can read and write as long as they take off their myopia glasses; But there are also some myopic patients who can’t see near without reading glasses. They need to wear a pair of reading glasses to read and write. What’s going on? How should myopia patients choose reading glasses?
and
are generally after the age of 40 ~ 45. They can’t see clearly when reading or doing other close work, and the phenomenon is getting worse year by year. In medicine, they are called presbyopia, commonly known as presbyopia. There is a structure called lens in the eye. It is a double-sided convex lens with thick center and thin edge. It is equivalent to the zoom lens of the camera. Under the joint action of the ciliary body, it can adjust the eyes to see distant and close scenes at various distances. The completion of this process depends on the elasticity of the lens itself, the contraction and relaxation of ciliary body and the relaxation and tension of lens suspensory ligament. It is called regulatory function in medicine.
with the increase of age, the elasticity of lens capsule decreases, the lens nucleus increases and hardens, the ciliary muscle weakens, the regulation decreases and presbyopia appears. Presbyopia is a normal physiological phenomenon, just like people’s hair turns white at a certain age. The eyes of myopic patients also have aging and presbyopia, but the presbyopia degree of myopic patients is just neutralized by the myopia degree, so presbyopia behaves later than those with normal eyes. Generally, you can not wear presbyopia glasses or only wear a pair of presbyopia glasses with low degree. Theoretically, people with myopia greater than 400 degrees will never have presbyopia. But in fact, it is not necessarily, because there are great individual differences in the adjustment of people’s eyes, which is why some patients with myopia need to wear reading glasses even if they have high myopia.
at present, there are two methods to correct presbyopia, one is to wear presbyopic glasses, the other is surgical treatmentTherapy. Surgical treatment is not very mature, so the most commonly used method is to wear reading glasses. Presbyopia is a kind of biconvex lens, which can supplement the lack of eye adjustment and achieve the purpose of correcting presbyopia. Before matching glasses, go to a regular hospital for optometry and check whether you have other eye diseases, determine whether there is myopia, hyperopia and astigmatism, and then increase or decrease the diopter according to age and presbyopia. The original myopia needs to subtract the degree of myopia from the degree of presbyopia at normal age. For example, the original 200 degree myopia is now 45 years old (the degree of presbyopia at normal age is 100 degrees). In fact, you can see nearby objects only by wearing 100 degree myopia lenses. If there is astigmatism, you need to integrate the astigmatism degree into the reading glasses. The relationship between the age of normal people and the degree of presbyopia is roughly as follows:
and
. Of course, the degree of presbyopia should be appropriately increased or reduced in combination with the usual working distance of patients. If the working distance is close, the degree of presbyopia should be appropriately increased; On the contrary, the degree should be appropriately reduced. For more information about progressive films, please consult in the hospital. When
and
are equipped with reading glasses, it is also necessary to measure the distance between the pupils of two eyes and determine the distance between the optical centers of the lenses on both sides of the glasses. The two must be consistent, otherwise there may be prism effect, interfere with visual function, dizziness, visual deformation, eye acid swelling, fatigue, etc. The selection of spectacle frame shall fully meet the optical requirements of the lens, and fully consider the distance between the pupils of two eyes and the inclination of the frame. A suitable frame shall be selected according to the size of the wearer’s eyes, face shape, eyebrow shape, etc. Large frames should be selected for those with large eyes, and smaller frames should be selected for those with small eyes. Fat round faces are suitable for wearing thick frames, thin and long faces are suitable for round frames, and flat round faces should use square frames with slightly narrow upper and lower frames. When selecting lenses, it should also be noted that glass lenses have high hardness and are not easy to scratch, but they are easy to be broken. The resin lens is light and not easy to be broken, but it has low hardness and is prone to scratches. Finally, we must understand that the accurate grinding of glasses is as important as accurate optometry. The grinding of glasses must be carried out in strict accordance with the glasses prescription prescribed by the doctor. Therefore, with presbyopia glasses, you must go to the glasses Center of a regular hospital for medical optometry instead of wearing them casually.